Awesome Java
- 3D Rendering Libraries
- API Documentation and Specification
- API Gateway Libraries
- API Testing and Monitoring
- Analytics Libraries
- Animation Libraries
- Artificial Intelligence Libraries
- Audio Libraries
- Audio and Music Libraries
- Augmented Reality Libraries
- Authentication and Authorization Libraries
- Barcode and QR Code Libraries
- Bean Mapping
- Big Data Processing Libraries
- Blockchain Libraries
- Bluetooth / NFC / Beacon Libraries
- Build Tools and Systems
- Bytecode Manipulation
- CQRS Libraries
- CSV Libraries
- Cache Libraries
- Caching Libraries
- Chatbot Libraries
- Cloud Services and Platforms
- Cloud Storage Libraries
- Cluster Management
- Code Analysis Tools
- Code Coverage Tools
- Code Generators
- Command Line Interface (CLI)
- Compiler-compiler
- Computer Vision
- Computer Vision Libraries
- Configuration Libraries
- Consensus Algorithm Libraries
- Constraint Satisfaction Problem Solver
- Containerization and Orchestration Libraries
- Content Management System (CMS) Libraries
- Continuous Integration and Deployment Libraries
- Cryptocurrency Libraries
- Cryptography and Encryption Libraries
- Data Mining Libraries
- Data Processing Libraries
- Data Streaming Libraries
- Data Structures and Algorithms
- Data Transformation Libraries
- Data Validation Libraries
- Data Visualization Libraries
- Database Drivers
- Database Libraries
- Database Migration Tools
- Date and Time Libraries
- Deep Learning Libraries
- Dependency Injection Frameworks
- Development Tools
- Distributed Applications
- Distributed Database Libraries
- Distributed Ledger Libraries
- Distributed Systems and Microservices Libraries
- Distributed Transactions
- Distribution Libraries
- Document Processing
- Document and Text Processing Libraries
- E-Commerce Libraries
- ETL and Data Integration
- Email Libraries
- Embedded Database Libraries
- Error Handling Libraries
- Event Sourcing Libraries
- Event-driven Architectures
- File Handling Libraries
- Financial Libraries
- Firewall and Intrusion Detection Libraries
- Formal Verification
- Frameworks and Libraries for State Management
- Functional Programming
- GIS Libraries
- Game Development Libraries
- Genetic Algorithm Libraries
- Geocoding Libraries
- Geolocation Libraries
- Geospatial Libraries
- Graph Databases
- Graph and Chart Libraries
- Graphical User Interface (GUI) Libraries
- HTTP Clients
- High-Performance Libraries
- Hypermedia Types
- Identity Management Libraries
- Image Processing Libraries
- Imagery Processing
- Internationalization (i18n) and Localization (l10n)
- Internet of Things (IoT) Libraries
- Introspection Libraries
- IoT Protocol Libraries
- JSON Libraries
- JVM and JDK Libraries
- Job Scheduling Libraries
- Key-value Stores
- Load Balancing Libraries
- Log and Tracing Libraries
- Logging Libraries
- Machine Learning Libraries
- Map Libraries
- Markdown Libraries
- Math and Numeric Libraries
- Media Libraries
- Message Queue Libraries
- Messaging Libraries
- Microservice Libraries
- Miscellaneous Libraries
- Mobile Development
- Monetization Libraries
- Monitoring Tools
- Monitoring and Observability Libraries
- Multi-factor Authentication (MFA) Libraries
- Native Libraries
- Natural Language Processing (NLP)
- Network Management Libraries
- Networking Libraries
- Networking Protocol Libraries
- NoSQL Databases
- Object Storage Libraries
- Object-Relational Mapping (ORM)
- Office File Processing Libraries
- Optimization Libraries
- PDF Libraries
- Payment Processing Libraries
- Performance Analysis Tools
- Platform Libraries
- Platform as a Service (PaaS) Libraries
- Plugins Libraries
- Process Management Libraries
- Project Management and Collaboration Libraries
- REST Frameworks
- Reactive Libraries
- Real-time Communication Libraries
- Recommender Systems Libraries
- Redux / ELM / Dependency Injection Libraries
- Regular Expressions Libraries
- Robotics and Automation Libraries
- SQL Query Builders
- Scanner Libraries
- Scientific Libraries
- Search Libraries
- Security Libraries
- Serialization Libraries
- Server Libraries
- Single Sign-On (SSO) Libraries
- Speech Recognition Libraries
- Storage Libraries
- Storage and File System Libraries
- Styling Libraries
- System Monitoring Libraries
- Template Engine Libraries
- Templates Libraries
- Testing Libraries
- Text Processing Libraries
- Text and Rich Content Libraries
- Third-party API Integration Libraries
- Time-series Databases
- Utility Libraries
- Version Control and Git Libraries
- Video Libraries
- Virtual Reality Libraries
- Virtualization Libraries
- Voice Libraries
- Web Crawling Libraries
- Web Frameworks
- Web Scraping Libraries
- WebRTC Libraries
- WebSocket Libraries
- Workflow Orchestration Engines
- XML Libraries
- YAML Libraries
- ZIP and Compression Libraries
Awesome Java
3D Rendering Libraries
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Android OpenGL ES 2.0/3.0 Engine
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Reusable code and assets for jMonkeyEngine games (code has New BSD license)
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A complete 3-D game development suite written in Java.
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Java™ Binding for the OpenGL® API
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A Java API for 3d and 2d charts
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Desktop/Android/HTML5/iOS Java game development framework
API Documentation and Specification
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Library for OpenAPI 3 with spring-boot
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Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API
API Gateway Libraries
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A Gateway built on Spring Framework and Spring Boot providing routing and more.
API Testing and Monitoring
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Java DSL for easy testing of REST services
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Support for Consumer Driven Contracts in Spring
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A tool for mocking HTTP services
Analytics Libraries
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Dr. Elephant is a job and flow-level performance monitoring and tuning tool for Apache Hadoop and Apache Spark
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Apache Druid: a high performance real-time analytics database.
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Uber Rides Android SDK (beta)
Animation Libraries
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Cute view animation collection.
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Lollipop ViewAnimationUtils.createCircularReveal for everyone 4.0+
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Set of extra Transitions on top of Jetpack Transitions Library
Artificial Intelligence Libraries
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Java Evaluator API for PMML
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Statistical Machine Intelligence & Learning Engine
Audio Libraries
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Modular audio synthesizer library with unit generators in Java
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Audio library for Processing built with JSyn
Audio and Music Libraries
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INACTIVE: A maven plugin for Docker
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Audio library for Processing built with JSyn
Augmented Reality Libraries
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Java langurge marker based AR tracking, based on the original ARToolKit library.
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Source code for the Processing Core and Development Environment (PDE)
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Processing mode and core library to create Android apps with Processing
Authentication and Authorization Libraries
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Open Source Identity and Access Management For Modern Applications and Services
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LINE Messaging API SDK for Java
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okta-auth-java
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Apache Shiro
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Spring Security
Barcode and QR Code Libraries
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Barcode Scanner Libraries for Android
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Code scanner library for Android, based on ZXing
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ZXing ("Zebra Crossing") barcode scanning library for Java, Android
Bean Mapping
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Dozer is a Java Bean to Java Bean mapper that recursively copies data from one object to another.
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An annotation processor for generating type-safe bean mappers
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Intelligent object mapping
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Repo of the Open Source Android library : RoboSpice. RoboSpice is a modular android library that makes writing asynchronous long running tasks easy. It is specialized in network requests, supports caching and offers REST requests out-of-the box using extension modules.
Big Data Processing Libraries
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Cruise-control is the first of its kind to fully automate the dynamic workload rebalance and self-healing of a Kafka cluster. It provides great value to Kafka users by simplifying the operation of Kafka clusters.
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Apache Flink
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Apache Hadoop
Blockchain Libraries
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A library for working with Bitcoin
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DEPRECATED! Java implementation of the Ethereum yellowpaper. For JSON-RPC and other client features check Ethereum Harmony
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Java Binding for the Exonum blockchain framework
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Lightweight Java and Android library for integration with Ethereum clients
Bluetooth / NFC / Beacon Libraries
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Example code for interacting with a Bluefruit Bluetooth LE UART in an Android application.
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BLE SDK for Android (v4.3 or above)
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An Android NFC app for reading, writing, analyzing, etc. MIFARE Classic RFID tags.
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Allows Android apps to interact with BLE beacons
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An Android library providing APIs to interact with iBeacons
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Sample app for the Host-based Card Emulation released in Android 4.4
Build Tools and Systems
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Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. By default it supports the Google Java Style Guide and Sun Code Conventions, but is highly configurable. It can be invoked with an ANT task and a command line program.
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Cucumber for the JVM
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INACTIVE: A maven plugin for Docker
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The new home of the FindBugs project
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🔬 Java Code Coverage Library
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🏗 Build container images for your Java applications.
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✅ The 5th major version of the programmer-friendly testing framework for Java and the JVM
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Apache Maven core
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Most popular Mocking framework for unit tests written in Java
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An extensible multilanguage static code analyzer.
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PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.
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SpotBugs is FindBugs' successor. A tool for static analysis to look for bugs in Java code.
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Spring Boot
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Zuul is a gateway service that provides dynamic routing, monitoring, resiliency, security, and more.
Bytecode Manipulation
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Java unlimited redefinition of classes at runtime.
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A tool to help eliminate NullPointerExceptions (NPEs) in your Java code with low build-time overhead
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Java libraries for writing composable microservices
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Runtime code generation for the Java virtual machine.
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OkBuck is a gradle plugin that lets developers utilize the Buck build system on a gradle project.
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A Java build tool that works seamlessly with modules
CQRS Libraries
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Transactional messaging for microservices
CSV Libraries
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Apache Commons CSV
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Comparisons among all Java-based CSV parsers in existence
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A fast, programmer-friendly, free CSV library for Java
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uniVocity-parsers is a suite of extremely fast and reliable parsers for Java. It provides a consistent interface for handling different file formats, and a solid framework for the development of new parsers.
Cache Libraries
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A high performance caching library for Java
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Apache Commons JCS
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Apache Geode
Caching Libraries
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A high performance caching library for Java
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Ehcache 3.x line
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FASTJSON 2.0.x has been released, faster and more secure, recommend you upgrade.
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An asynchronous memcache client for Java
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Apache Geode
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Google core libraries for Java
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Open-source distributed computation and storage platform. Real-time Stream Processing Unconference. Save Your Spot https://hazelcast.com/lp/unconference/
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The Heroic Time Series Database
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Apache Ignite
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Infinispan is an open source data grid platform and highly scalable NoSQL cloud data store.
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Redisson - Redis Java client with features of In-Memory Data Grid. Over 50 Redis based Java objects and services: Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Publish / Subscribe, Bloom filter, Spring Cache, Tomcat, Scheduler, JCache API, Hibernate, MyBatis, RPC, local cache ...
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Provides support to increase developer productivity in Java when using Redis, a key-value store. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.
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Spring Session
Chatbot Libraries
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Client libraries and samples for connecting to IBM Watson IoT using Java
Cloud Services and Platforms
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This repository is for active development of the Azure SDK for Java. For consumers of the SDK we recommend visiting our public developer docs at https://docs.microsoft.com/java/azure/ or our versioned developer docs at https://azure.github.io/azure-sdk-for-java.
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Google Cloud Client Library for Java
Cloud Storage Libraries
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A Java library for the Dropbox Core API.
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Read-only mirror of ASF Git Repo for jclouds
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MinIO Client SDK for Java
Cluster Management
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AWS Service registry for resilient mid-tier load balancing and failover.
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Apache Hadoop
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Apache ZooKeeper
Code Analysis Tools
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Automatic binding+disposal of RxJava streams.
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A tool to help eliminate NullPointerExceptions (NPEs) in your Java code with low build-time overhead
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Automatic tagging of RxJava 2+ originating subscribe points for onError() investigation.
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Pluggable type-checking for Java
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Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. By default it supports the Google Java Style Guide and Sun Code Conventions, but is highly configurable. It can be invoked with an ANT task and a command line program.
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Catch common Java mistakes as compile-time errors
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The SpotBugs plugin for security audits of Java web applications and Android applications. (Also work with Kotlin, Groovy and Scala projects)
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Java 1-15 Parser and Abstract Syntax Tree for Java, including preview features to Java 13
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OkBuck is a gradle plugin that lets developers utilize the Buck build system on a gradle project.
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An extensible multilanguage static code analyzer.
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SpotBugs is FindBugs' successor. A tool for static analysis to look for bugs in Java code.
Code Coverage Tools
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This repository contains source code of OpenClover Core as well as its integrations: Clover-for-Ant, Clover-for-Eclipse and Clover-for-IDEA plugins. Sources are licensed under Apache 2.0 license.
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🔬 Java Code Coverage Library
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Advanced Java library for integration testing, mocking, faking, and code coverage
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Most popular Mocking framework for unit tests written in Java
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PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.
Code Generators
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Java libraries for writing composable microservices
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Runtime code generation for the Java virtual machine.
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MATURE: A set of Maven tools for dealing with Dockerfiles
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An annotation-based Java library for creating Thrift serializable types and services.
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Distributed Big Data Orchestration Service
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A Java API for generating .java source files.
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An annotation processor for generating type-safe bean mappers
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For more info see
Command Line Interface (CLI)
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Java annotation-based framework for parsing Git like command line structures
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Apache Commons CLI
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Jansi is a small java library that allows you to use ANSI escape sequences to format your console output which works even on windows.
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Java SSH client (an object-oriented wrapper around JSch)
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JLine is a Java library for handling console input.
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Picocli is a modern framework for building powerful, user-friendly, GraalVM-enabled command line apps with ease. It supports colors, autocompletion, subcommands, and more. In 1 source file so apps can include as source & avoid adding a dependency. Written in Java, usable from Groovy, Kotlin, Scala, etc.
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ZeroTurnaround Process Executor
Compiler-compiler
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ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.
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Java 1-15 Parser and Abstract Syntax Tree for Java, including preview features to Java 13
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Efficiently create compact tree layouts in Java
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xtext-core
Computer Vision
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Fast computer vision library for SFM, calibration, fiducials, tracking, image processing, and more.
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Face detection with OpenCV and JavaFX
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Java interface to OpenCV, FFmpeg, and more
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The OpenIMAJ source code repository
Computer Vision Libraries
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Fast computer vision library for SFM, calibration, fiducials, tracking, image processing, and more.
Configuration Libraries
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Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable.
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SSE Stream Aggregator
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Library for configuration management API
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configuration library for JVM languages using HOCON files
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AWS Service registry for resilient mid-tier load balancing and failover.
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Distributed Big Data Orchestration Service
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Docker container orchestration platform
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Iceberg is a table format for large, slow-moving tabular data
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Jasypt integration for Spring boot
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Ribbon is a Inter Process Communication (remote procedure calls) library with built in software load balancers. The primary usage model involves REST calls with various serialization scheme support.
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Client library for collecting metrics.
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Zuul is a gateway service that provides dynamic routing, monitoring, resiliency, security, and more.
Consensus Algorithm Libraries
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Algorand SDK for Java7+ to interact with the Algorand network
Constraint Satisfaction Problem Solver
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Java implementation of algorithms from Russell And Norvig's "Artificial Intelligence - A Modern Approach"
Containerization and Orchestration Libraries
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Official Java client library for kubernetes
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Java client for Kubernetes & OpenShift
Content Management System (CMS) Libraries
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(Official) The DSpace digital asset management system that powers your Institutional Repository
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Community Content Service Repository
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Thymeleaf is a modern server-side Java template engine for both web and standalone environments.
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The XWiki platform
Continuous Integration and Deployment Libraries
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Jenkins automation server
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🏗 Build container images for your Java applications.
Cryptocurrency Libraries
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IOTA Reference Implementation
Cryptography and Encryption Libraries
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Bouncy Castle Java Distribution (Mirror)
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A Java implementation of OpenBSD's Blowfish password hashing code
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A system for distributing and managing secrets
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Apache Shiro
Data Mining Libraries
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Outdated version of RapidMiner Studio 7.x - 9.7. See rapidminer-studio-modular for the latest version 9.8+
Data Processing Libraries
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Google-provided Cloud Dataflow template pipelines for solving simple in-Cloud data tasks
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The Data Transfer Project makes it easy for people to transfer their data between online service providers. We are establishing a common framework, including data models and protocols, to enable direct transfer of data both into and out of participating online service providers.
Data Streaming Libraries
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Google-provided Cloud Dataflow template pipelines for solving simple in-Cloud data tasks
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Client library for Amazon Kinesis
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Allows developers to install and customize their connected camera and other devices to securely stream video, audio, and time-encoded data to Kinesis Video Streams
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Connector that generates data for demos
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Apache Kafka® running on Kubernetes
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Vert.x examples
Data Structures and Algorithms
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A collection of algorithms and data structures
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All Algorithms implemented in Java
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Algorithms, 4th edition textbook code and libraries
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Interview questions
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Algorithms and Data Structures implemented in Java
Data Transformation Libraries
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Apache Avro is a data serialization system.
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Embulk: Pluggable Bulk Data Loader.
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This project has been transfered to https://github.com/alibaba/fastjson !
Data Validation Libraries
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Hibernate Validator - Jakarta Bean Validation Reference Implementation
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JSON Schema validator for java, based on the org.json API
Data Visualization Libraries
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A powerful 🚀 Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick charts as well as scaling, panning and animations.
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Charts library for Android compatible with API 8+, several chart types with scaling, scrolling and animations 📊
Database Drivers
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The official ArangoDB Java driver.
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Java client and JDBC driver for ClickHouse
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Free and Open, Distributed, RESTful Search Engine
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H2 is an embeddable RDBMS written in Java.
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Java client for InfluxDB
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Redis Java client
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The Java driver for MongoDB
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The Microsoft JDBC Driver for SQL Server is a Type 4 JDBC driver that provides database connectivity with SQL Server through the standard JDBC application program interfaces (APIs).
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MySQL Connector/J
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Neo4j Bolt driver for Java
Database Libraries
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Apache Beam is a unified programming model for Batch and Streaming data processing.
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Mirror of Apache Cassandra
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Apache Druid: a high performance real-time analytics database.
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Ehcache 3.x line
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Apache Flink
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H2 is an embeddable RDBMS written in Java.
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Apache HBase
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Apache Ignite
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Infinispan is an open source data grid platform and highly scalable NoSQL cloud data store.
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Mirror of Apache Kafka
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Apache Kylin
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Main Liquibase Source
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MyBatis SQL mapper framework for Java
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Apache NiFi
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Apache Pulsar - distributed pub-sub messaging system
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Unified Queries for Java
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Redisson - Redis Java client with features of In-Memory Data Grid. Over 50 Redis based Java objects and services: Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Publish / Subscribe, Bloom filter, Spring Cache, Tomcat, Scheduler, JCache API, Hibernate, MyBatis, RPC, local cache ...
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Mirror of Apache Samza
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Apache TinkerPop - a graph computing framework
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Apache ZooKeeper
Database Migration Tools
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Flyway by Redgate • Database Migrations Made Easy.
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Main Liquibase Source
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A command line Database migrations tool
Date and Time Libraries
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Miscellaneous classes, implementations with gradle and jmh set up
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Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.
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Social Style Date and Time Formatting for Java
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Provides additional date-time classes that complement those in JDK 8
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Backport of functionality based on JSR-310 to Java SE 6 and 7. This is NOT an implementation of JSR-310.
Deep Learning Libraries
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The missing Java distribution of native C++ libraries
Dependency Injection Frameworks
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Weld, including integrations for Servlet containers and Java SE, examples and documentation
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Guice (pronounced 'juice') is a lightweight dependency injection framework for Java 8 and above, brought to you by Google.
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Spring Framework
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Mirror of Apache Tapestry 5
Development Tools
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Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable.
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RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
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SSE Stream Aggregator
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Catch common Java mistakes as compile-time errors
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The SpotBugs plugin for security audits of Java web applications and Android applications. (Also work with Kotlin, Groovy and Scala projects)
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✅ The 5th major version of the programmer-friendly testing framework for Java and the JVM
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Render After Effects animations natively on Android and iOS, Web, and React Native
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Apache Maven core
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A type-safe HTTP client for Android and the JVM
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Ribbon is a Inter Process Communication (remote procedure calls) library with built in software load balancers. The primary usage model involves REST calls with various serialization scheme support.
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Spring Boot
Distributed Applications
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Examples of how to use Cloud Bigtable both with GCE map/reduce as well as stand alone applications.
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Mirror of Apache Kafka
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This repository contains open-source projects managed by the owners of Google Cloud Pub/Sub.
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Vert.x is a tool-kit for building reactive applications on the JVM
Distributed Database Libraries
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Confluent Schema Registry for Kafka
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An open source clone of Amazon's Dynamo.
Distributed Ledger Libraries
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Java Binding for the Exonum blockchain framework
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Hedera™ Hashgraph SDK for Java
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IOTA Reference Implementation
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Algorand SDK for Java7+ to interact with the Algorand network
Distributed Systems and Microservices Libraries
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Tools for detecting and avoiding linkage errors in GCP open source projects
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Apache Dubbo is a high-performance, java based, open source RPC framework.
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Rest.li is a REST+JSON framework for building robust, scalable service architectures using dynamic discovery and simple asynchronous APIs.
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Integration with Netflix OSS components
Distributed Transactions
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JTA Transaction Manager
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Ecosystem to transform any database into a distributed database system, and enhance it with sharding, elastic scaling, encryption features & more
Distribution Libraries
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Apache Commons Lang
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Google core libraries for Java
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Pure Java ZeroMQ
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Java binding for ZeroMQ
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Vert.x is a tool-kit for building reactive applications on the JVM
Document Processing
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Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts.
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The Box SDK for Java.
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iText for Java represents the next level of SDKs for developers that want to take advantage of the benefits PDF can bring. Equipped with a better document engine, high and low-level programming capabilities and the ability to create, edit and enhance PDF documents, iText can be a boon to nearly every workflow.
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Java and Kotlin Code samples used on cloud.google.com
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Graphs for Everyone
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Mirror of Apache PDFBox
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Mirror of Apache POI
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Terrier IR Platform
Document and Text Processing Libraries
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Style and Grammar Checker for 25+ Languages
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The Apache Tika toolkit detects and extracts metadata and text from over a thousand different file types (such as PPT, XLS, and PDF).
E-Commerce Libraries
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Drools and jBPM integration with seam, spring, camel, ...
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Shopizer java e-commerce software
ETL and Data Integration
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OS code of Data-prep project
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The Data Transfer Project makes it easy for people to transfer their data between online service providers. We are establishing a common framework, including data models and protocols, to enable direct transfer of data both into and out of participating online service providers.
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Apache NiFi
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Pentaho Data Integration ( ETL ) a.k.a Kettle
Email Libraries
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OfficeFloor - inversion of coupling control
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Emails at the heart of your business logic!
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Simple API, Complex Emails (Jakarta Mail smtp wrapper)
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Spring Integration provides an extension of the Spring programming model to support the well-known Enterprise Integration Patterns (EIP)
Embedded Database Libraries
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数据库微服务一体化、单机分布式一体化
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An open source time-series database for fast ingest and SQL queries
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High performance reactive SQL Client written in Java
Error Handling Libraries
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Tools for keeping your cloud operating in top form. Chaos Monkey is a resiliency tool that helps applications tolerate random instance failures.
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Resilience4j is a fault tolerance library designed for Java8 and functional programming
Event Sourcing Libraries
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Framework for Evolutionary Message-Driven Microservices on the JVM
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Server for the Echoprint audio fingerprint system
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Transactional messaging for microservices
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Demo applications and code examples for Apache Kafka's Streams API.
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Java implementation of the Sparkey key value store
Event-driven Architectures
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Framework for Evolutionary Message-Driven Microservices on the JVM
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Powertools is a developer toolkit to implement Serverless best practices and increase developer velocity.
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FaaS (Function as a service) framework for writing portable Java functions
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Kafka Connect Elasticsearch connector
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Kafka Connect connector for JDBC-compatible databases
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Micronaut Application Framework
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Reactive Kafka Driver with Reactor
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Provides Familiar Spring Abstractions for Apache Kafka
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Apache Kafka® running on Kubernetes
File Handling Libraries
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Apache Commons VFS
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Java runtime metadata analysis
Financial Libraries
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Open source analytics and market risk library from OpenGamma
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A library for working with Bitcoin
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Coinbase API v1 library for Java
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DEPRECATED! Java implementation of the Ethereum yellowpaper. For JSON-RPC and other client features check Ethereum Harmony
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Comprehensive Java library for the Ontology blockchain.
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A Java library for technical analysis.
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XChange-stream is a Java library providing a simple and consistent streaming API for interacting with Bitcoin and other crypto currency exchanges via WebSocket protocol. It is build on top of of XChange library providing new interfaces for streaming API. User can subscribe for live updates via reactive streams of RxJava library.
Firewall and Intrusion Detection Libraries
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Graylog Processing Pipeline functions to enrich log messages with IoC information from threat intelligence databases
Formal Verification
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Java bindings for the AWS Common Runtime
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CPAchecker, the Configurable Software-Verification Platform (read-only mirror)
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JavaSMT - Unified Java API for SMT solvers.
Frameworks and Libraries for State Management
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Automatic binding+disposal of RxJava streams.
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Epoxy is an Android library for building complex screens in a RecyclerView
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A functional reactive framework for managing state evolution and side-effects.
Functional Programming
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RxJava bindings for JavaFX
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Pluggable type-checking for Java
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Functional programming in Java
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vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.
GIS Libraries
-
Official GeoTools repository
-
The JTS Topology Suite is a Java library for creating and manipulating vector geometry.
-
Java port of the Proj.4 library for coordinate reprojection
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LocationTech Spatial4j: A Geospatial Library for Java
Game Development Libraries
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The automation tower defense RTS
-
Terasology - open source voxel world
-
Reusable code and assets for jMonkeyEngine games (code has New BSD license)
-
A complete 3-D game development suite written in Java.
-
Desktop/Android/HTML5/iOS Java game development framework
Genetic Algorithm Libraries
-
Jenetics - Genetic Algorithm, Genetic Programming, Grammatical Evolution, Evolutionary Algorithm, and Multi-objective Optimization
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oj! Algorithms
-
The Watchmaker Framework for Evolutionary Computation
Geocoding Libraries
-
Java annotation-based framework for parsing Git like command line structures
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Java client library for Google Maps API Web Services
Geolocation Libraries
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Android library to handle jobs in the background.
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The Esri Geometry API for Java enables developers to write custom applications for analysis of spatial data. This API is used in the Esri GIS Tools for Hadoop and other 3rd-party data processing solutions.
-
Java client library for Google Maps API Web Services
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Java bindings for H3, a hierarchical hexagonal geospatial indexing system
-
High-quality WebSocket client implementation in Java.
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Uber Rides Android SDK (beta)
-
Uber Rides Java SDK (beta)
Geospatial Libraries
-
The Esri Geometry API for Java enables developers to write custom applications for analysis of spatial data. This API is used in the Esri GIS Tools for Hadoop and other 3rd-party data processing solutions.
-
The JTS Topology Suite is a Java library for creating and manipulating vector geometry.
Graph Databases
-
A Property Graph Model Interface (no longer active - see Apache TinkerPop)
-
JanusGraph: an open-source, distributed graph database
-
OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID Transactions, Full-Text indexing and Reactive Queries.
Graph and Chart Libraries
-
AnyChart Android Chart is an amazing data visualization library for easily creating interactive charts in Android apps. It runs on API 19+ (Android 4.4) and features dozens of built-in chart types.
-
A powerful 🚀 Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick charts as well as scaling, panning and animations.
-
A beautiful Android custom View that works similar to a range or seekbar. With animations.
-
Charts library for Android compatible with API 8+, several chart types with scaling, scrolling and animations 📊
-
A 2D chart library for Java applications (JavaFX, Swing or server-side).
Graphical User Interface (GUI) Libraries
-
High quality UI controls to complement the core JavaFX distribution
HTTP Clients
-
Asynchronous Http and WebSocket Client library for Java
-
Mirror of Apache HttpClient
High-Performance Libraries
-
Replicate your Key Value Store across your network, with consistency, persistance and performance.
-
Efficient reliable UDP unicast, UDP multicast, and IPC message transport
-
High Performance data structures and utility methods for Java
-
A port of Snappy, LZO, LZ4, and Zstandard to Java
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Artio - Resilient High-Performance FIX and FIXP Gateway
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High Performance Inter-Thread Messaging Library
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Netty project - an event-driven asynchronous network application framework
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Simple Binary Encoding (SBE) - High Performance Message Codec
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Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.
Hypermedia Types
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Cassandra Java Client
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HalBuilder Core
-
Docker container orchestration platform
-
The Heroic Time Series Database
-
Spring HATEOAS - Library to support implementing representations for hyper-text driven REST web services.
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"The path to execution", Styx is a service that schedules batch data processing jobs in Docker containers on Kubernetes.
-
Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API
-
Common library for serving TensorFlow, XGBoost and scikit-learn models in production.
Identity Management Libraries
-
Open Source Identity and Access Management For Modern Applications and Services
-
OAuth 2.0 server and client; OpenID Connect Provider (OP) & UMA Authorization Server (AS)
Image Processing Libraries
-
Public domain software for processing and analyzing scientific images – a.k.a. ImageJ 1.x
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JAI ImageIO Core (without javax.media.jai dependencies)
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JCodec main repo
-
GStreamer-based video library for Processing
-
SQLite JDBC Driver
-
The goal of this project is to allow integrated or USB-connected webcams to be accessed directly from Java. Using provided libraries users are able to read camera images and detect motion. Main project consist of several sub projects - the root one, which contains required classes, build-in webcam driver compatible with Windows, Linux and Mac OS, which can stream images as fast as your camera can serve them (up to 50 FPS). Main project can be used standalone, but user is able to replace build-in driver with different one - such as OpenIMAJ, GStreamer, V4L4j, JMF, LTI-CIVIL, FMJ, etc.
Imagery Processing
-
Public domain software for processing and analyzing scientific images – a.k.a. ImageJ 1.x
-
JAI ImageIO Core (without javax.media.jai dependencies)
-
Java interface to OpenCV, FFmpeg, and more
-
Source code for the Processing Core and Development Environment (PDE)
Internationalization (i18n) and Localization (l10n)
-
⛔️ [DEPRECATED] A reusable Android rich text editor component.
-
Apache Dubbo is a high-performance, java based, open source RPC framework.
-
Hibernate Validator - Jakarta Bean Validation Reference Implementation
-
For more info see
Internet of Things (IoT) Libraries
-
Eclipse Hono™ Project
-
Java Library for LWM2M
-
Eclipse Paho Java MQTT client library. Paho is an Eclipse IoT project.
Introspection Libraries
-
A Java serialization/deserialization library to convert Java Objects into JSON and back
-
Java runtime metadata analysis
IoT Protocol Libraries
-
CoAP/DTLS Java Implementation
-
Eclipse Hono™ Project
-
Client libraries and samples for connecting to IBM Watson IoT using Java
-
Eclipse Kura™ project
JSON Libraries
-
A reference implementation of a JSON package in Java.
-
Airlift framework for building REST services
-
Embulk: Pluggable Bulk Data Loader.
-
A Java serialization/deserialization library to convert Java Objects into JSON and back
-
JSON Schema validator for java, based on the org.json API
JVM and JDK Libraries
-
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
-
Apache Commons IO
-
Apache Commons Lang
-
An image loading and caching library for Android focused on smooth scrolling
-
Hibernate's core Object/Relational Mapping functionality
-
Eclipse Jetty® - Web Container & Clients - supports HTTP/2, HTTP/1.1, HTTP/1.0, websocket, servlets, and more
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Apache Log4j 2 is a versatile, feature-rich, efficient logging API and backend for Java.
-
Render After Effects animations natively on Android and iOS, Web, and React Native
-
A type-safe HTTP client for Android and the JVM
-
Simplifies the development of creating a JPA-based data access layer.
-
Spring Framework
-
Apache Tomcat
Job Scheduling Libraries
-
Distributed lock for your scheduled tasks
-
Azkaban workflow manager.
-
Conductor is a microservices orchestration engine.
-
Code for Quartz Scheduler
Key-value Stores
-
Extensible Scheduler for Mesos Frameworks
-
Cruise-control is the first of its kind to fully automate the dynamic workload rebalance and self-healing of a Kafka cluster. It provides great value to Kafka users by simplifying the operation of Kafka clusters.
-
Twitter's collection of LZO and Protocol Buffer-related Hadoop, Pig, Hive, and HBase code.
-
Redis Java client
-
Netflix's In-Memory Data Propagation Framework
Load Balancing Libraries
-
The JGroups project
-
Your go-to microservice framework for any situation, from the creator of Netty et al. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, Retrofit, Reactive Streams, Spring Boot and Dropwizard.
-
Powertools is a developer toolkit to implement Serverless best practices and increase developer velocity.
-
A Java wrapper to run Spring, Jersey, Spark, and other apps inside AWS Lambda.
Log and Tracing Libraries
-
BTrace - a safe, dynamic tracing tool for the Java platform
-
The reliable, generic, fast and flexible logging framework for Java.
Logging Libraries
-
Tools for keeping your cloud operating in top form. Chaos Monkey is a resiliency tool that helps applications tolerate random instance failures.
-
Cassandra Java Client
-
ZooKeeper client wrapper and rich ZooKeeper framework
-
Free and open source log management
-
Hollow is a java library and toolset for disseminating in-memory datasets from a single producer to many consumers for high performance read-only access.
-
Iceberg is a table format for large, slow-moving tabular data
-
The reliable, generic, fast and flexible logging framework for Java.
-
Apache Log4j 2 is a versatile, feature-rich, efficient logging API and backend for Java.
-
Client library for collecting metrics.
-
Titus is the Netflix Container Management Platform that manages containers and provides integrations to the infrastructure ecosystem.
Machine Learning Libraries
-
RxJava bindings for JavaFX
-
Suite of tools for deploying and training deep learning models using the JVM. Highlights include model import for keras, tensorflow, and onnx/pytorch, a modular and tiny c++ library for running math code and a java based math library on top of the core c++ library. Also includes samediff: a pytorch/tensorflow like library for running deep learning using automatic differentiation.
-
Mirror of Apache Mahout
Map Libraries
-
Algorithms, 4th edition textbook code and libraries
-
ArcGIS Runtime SDK for Java samples
-
Open source routing engine for OpenStreetMap. Use it as Java library or standalone web server.
-
Java bindings for H3, a hierarchical hexagonal geospatial indexing system
-
The Mapbox Java SDK – Java wrappers around Mapbox APIs and other location data
Markdown Libraries
-
CommonMark/Markdown Java parser with source level AST. CommonMark 0.28, emulation of: pegdown, kramdown, markdown.pl, MultiMarkdown. With HTML to MD, MD to PDF, MD to DOCX conversion modules.
-
A pure-Java Markdown processor based on a parboiled PEG parser supporting a number of extensions
Math and Numeric Libraries
-
A simple integer compression library in Java
-
Advanced Java BigDecimal math functions (pow, sqrt, log, sin, ...) using arbitrary precision.
-
Java Evaluator API for PMML
-
Statistical Machine Intelligence & Learning Engine
Media Libraries
-
Image Cropping Library for Android, optimized for Camera / Gallery.
-
This library provides a simple way to add a draggable sliding up panel (popularized by Google Music and Google Maps) to your Android application. Brought to you by Umano.
-
An extensible media player for Android
-
An page indicator for Android ViewPager
-
Reactive Programming for Android
-
An Android library for managing images and the memory they use.
Message Queue Libraries
-
This repository contains open-source projects managed by the owners of Google Cloud Pub/Sub.
-
RabbitMQ Java client
-
"The path to execution", Styx is a service that schedules batch data processing jobs in Docker containers on Kubernetes.
Messaging Libraries
-
Pure Java ZeroMQ
-
Spring Integration provides an extension of the Spring programming model to support the well-known Enterprise Integration Patterns (EIP)
Microservice Libraries
-
Web UI for PrestoDB.
-
Library for configuration management API
-
ZooKeeper client wrapper and rich ZooKeeper framework
-
The Java gRPC implementation. HTTP/2 based RPC
-
Netflix Application Monitoring Library
-
Integration with Netflix OSS components
-
Netflix's distributed Data Pipeline
Miscellaneous Libraries
-
Apache Commons Codec
-
Apache Commons IO
-
INACTIVE: A simple docker client for the JVM
-
阿里云计算平台DataWorks(https://help.aliyun.com/document_detail/137663.html) 团队出品，为监控而生的数据库连接池
-
An image loading and caching library for Android focused on smooth scrolling
-
jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.
Mobile Development
-
Samples demonstrating how to use Maps SDK for Android
-
✔️ Simple, pretty and powerful logger for android
Monetization Libraries
-
Open In-App Billing for Google Play, SlideMe, Amazon Store, Nokia Store, Samsung Apps, Yandex.Store, Appland, Aptoide, AppMall and Fortumo.
-
StartApp InApp Android SDK Example Project
-
A lightweight implementation of Android In-app Billing Version 3
-
Android in-app purchase & virtual economy library. Part of The SOOMLA Framework - for game design, economy modeling and faster development.
Monitoring Tools
-
Conductor is a microservices orchestration engine.
-
APM, Application Performance Monitoring System
-
Titus is the Netflix Container Management Platform that manages containers and provides integrations to the infrastructure ecosystem.
Monitoring and Observability Libraries
-
Elastic APM Java Agent
-
Prometheus instrumentation library for JVM applications
-
Epoxy is an Android library for building complex screens in a RecyclerView
-
Java library for sending telemetry data to New Relic
-
OpenTracing API for Java. 🛑 This library is DEPRECATED! https://github.com/opentracing/specification/issues/163
-
APM, Application Performance Monitoring System
Multi-factor Authentication (MFA) Libraries
-
Google Authenticator Server side code
Native Libraries
-
Apache Commons Codec
-
Apache Commons Collections
-
Apache Commons CSV
-
Apache Commons DbUtils
-
Apache Commons Math
-
Apache Commons Text
-
Apache Commons Validator
-
High Performance Inter-Thread Messaging Library
-
Netty project - an event-driven asynchronous network application framework
Natural Language Processing (NLP)
-
Stanford CoreNLP: A Java suite of core NLP tools.
-
NLP framework for JVM languages.
-
Apache OpenNLP
Network Management Libraries
-
Free and open source log management
-
Mirror of Apache MINA
-
Enterprise-Grade Open-Source Network Management Platform
Networking Libraries
-
A barebones WebSocket client and server implementation written in 100% Java.
-
Airlift framework for building REST services
-
Asynchronous Http and WebSocket Client library for Java
-
Apache Camel is an open source integration framework that empowers you to quickly and easily integrate various systems consuming or producing data.
-
INACTIVE: A simple docker client for the JVM
-
Mirror of Apache HttpClient
-
High performance non-blocking webserver
-
Vert.x examples
Networking Protocol Libraries
-
Mirror of Apache MINA
-
Eclipse Paho Java MQTT client library. Paho is an Eclipse IoT project.
NoSQL Databases
-
The official ArangoDB Java driver.
-
Mirror of Apache Cassandra
-
The JVM core for Couchbase SDKs.
-
Free and Open, Distributed, RESTful Search Engine
-
FASTJSON 2.0.x has been released, faster and more secure, recommend you upgrade.
-
Open-source distributed computation and storage platform. Real-time Stream Processing Unconference. Save Your Spot https://hazelcast.com/lp/unconference/
-
JetCache is a Java cache framework.
-
Eclipse JNoSQL is a framework which has the goal to help Java developers to create Jakarta EE applications with NoSQL.
-
Enterprise Stream Process Engine
-
The Java driver for MongoDB
-
an easy-to-use dynamic service discovery, configuration and service management platform for building cloud native applications.
-
Graphs for Everyone
-
OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID Transactions, Full-Text indexing and Reactive Queries.
-
Mongo Client for Eclipse Vert.x
Object Storage Libraries
-
Aliyun OSS SDK for Java
-
ibm-cos-sdk-java
Object-Relational Mapping (ORM)
-
Ebean ORM
-
Hibernate's core Object/Relational Mapping functionality
-
MyBatis SQL mapper framework for Java
-
Unified Queries for Java
-
Java library for efficiently working with heap and off-heap memory
-
Simplifies the development of creating a JPA-based data access layer.
-
JDBC support for Vert.x
-
Mongo Client for Eclipse Vert.x
-
This client is deprecated - use instead
Office File Processing Libraries
-
Reading and Writing XLSX and XLS on Android 5+ with Apache POI
-
An easy-to-use implementation of a streaming Excel reader using Apache POI
-
Generate and read big Excel files quickly
-
Mirror of Apache POI
-
A sample project that shows how Apache POI can be used in an Android application
Optimization Libraries
-
oj! Algorithms
PDF Libraries
-
OpenPDF is a free Java library for creating and editing PDF files with a LGPL and MPL open source license. OpenPDF is based on a fork of iText. We welcome contributions from other developers. Please feel free to submit pull-requests and bugreports to this GitHub repository. ⛺
-
[DEPRECATED] Core Java Library + PDF/A, xtra and XML Worker. Only security fixes will be added — please use iText 7
-
Mirror of Apache PDFBox
-
Simple Logging Facade for Java
-
Industry supported, open source PDF/A validation library
Payment Processing Libraries
-
Java SDK for PayPal RESTful APIs
-
Adyen API Library for Java
-
Braintree Java library
-
Java SDK for Authorize.Net API
-
Java library for the Stripe API.
Performance Analysis Tools
-
Elastic APM Java Agent
-
Hollow is a java library and toolset for disseminating in-memory datasets from a single producer to many consumers for high performance read-only access.
-
OpenTracing API for Java. 🛑 This library is DEPRECATED! https://github.com/opentracing/specification/issues/163
-
Performance Test Running and Reporting for Jenkins CI
-
Netflix Application Monitoring Library
Platform Libraries
-
Apache Commons Collections
-
Apache Commons Math
-
Apache Tomcat
Platform as a Service (PaaS) Libraries
-
This repository is for active development of the Azure SDK for Java. For consumers of the SDK we recommend visiting our public developer docs at https://docs.microsoft.com/java/azure/ or our versioned developer docs at https://azure.github.io/azure-sdk-for-java.
-
Java Client Library for Cloud Foundry
-
Google Cloud Client Library for Java
-
Integration between Cloudfoundry and the Spring Cloud APIs
Plugins Libraries
-
Apache Camel is an open source integration framework that empowers you to quickly and easily integrate various systems consuming or producing data.
Process Management Libraries
-
Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts.
-
Flexible framework for workflow and decision automation with BPMN and DMN. Integration with Spring, Spring Boot, CDI.
-
A compact and highly efficient workflow and Business Process Management (BPM) platform for developers, system admins and business users.
-
Repository with example Flowable projects
-
Sample application demonstrating an order fulfillment system decomposed into multiple independant components (e.g. microservices). Showing concrete implementation alternatives using e.g. Java, Spring Boot, Apache Kafka, Camunda, Zeebe, ...
-
The open source technology for business process management
-
a Business Process Management (BPM) Suite
Project Management and Collaboration Libraries
-
Community Content Service Repository
-
Jenkins automation server
-
Sonatype Nexus Repository Manager; Open-source codebase mirror
REST Frameworks
-
Reactive Extension (Rx) Adaptor for Netty
-
Web UI for PrestoDB.
-
Your go-to microservice framework for any situation, from the creator of Netty et al. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, Retrofit, Reactive Streams, Spring Boot and Dropwizard.
-
Google HTTP Client Library for Java
-
Eclipse Jersey Project - Read our Wiki:
-
Jodd! Lightweight. Java. Zero dependencies. Use what you like.
-
Rapidoid - Extremely Fast, Simple and Powerful Java Web Framework and HTTP Server!
-
High performance non-blocking webserver
-
HTTP web applications for Vert.x
Reactive Libraries
-
RxJava bindings for Android
-
Reactive Extension (Rx) Adaptor for Netty
-
Non-Blocking Reactive Foundation for the JVM
-
Java implementation of RSocket
Real-time Communication Libraries
-
An XMPP server licensed under the Open Source Apache License.
-
The Open Source Cloud Communications Platform
-
A modular and portable open source XMPP client library written in Java for Android and Java (SE) VMs
-
Efficient reliable UDP unicast, UDP multicast, and IPC message transport
-
Event Driven WebSockets Framework with Cross-Browser Fallbacks
-
Persistent (immutable) collections for Java and Kotlin
Recommender Systems Libraries
-
LensKit recommender toolkit.
-
Mirror of Apache Mahout
Redux / ELM / Dependency Injection Libraries
-
Automatic tagging of RxJava 2+ originating subscribe points for onError() investigation.
-
A utility library for Android to save objects in a Bundle without any boilerplate.
-
Source-agnostic distributed change data capture system
-
Thrift on Netty
Regular Expressions Libraries
-
Java regular expressions made easy.
-
linear time regular expression matching in Java
Robotics and Automation Libraries
-
An implementation of ROS in pure Java with Android support.
SQL Query Builders
-
IntelliJ plugin - https://plugins.jetbrains.com/plugin/2162
-
jOOQ is the best way to write SQL in Java
-
Java library for efficiently working with heap and off-heap memory
Scanner Libraries
-
The new home of the FindBugs project
-
A collection of libraries for single-pass, distributed, sublinear-space approximate aggregation and sketching algorithms. Currently: HyperLogLog++; more to come.
Scientific Libraries
-
📖🔬☕ BioJava is an open-source project dedicated to providing a Java library for processing biological data.
-
Suite of tools for deploying and training deep learning models using the JVM. Highlights include model import for keras, tensorflow, and onnx/pytorch, a modular and tiny c++ library for running math code and a java based math library on top of the core c++ library. Also includes samediff: a pytorch/tensorflow like library for running deep learning using automatic differentiation.
-
A 2D chart library for Java applications (JavaFX, Swing or server-side).
-
A plugin framework and application container with built-in extensibility mechanism 🔌
-
Java dataframe and visualization library
Search Libraries
-
Guice (pronounced 'juice') is a lightweight dependency injection framework for Java 8 and above, brought to you by Google.
-
Hibernate Search: full-text search for domain model
-
Apache Lucene open-source search software
-
Provide support to increase developer productivity in Java when using Elasticsearch. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.
Security Libraries
-
Bouncy Castle Java Distribution (Mirror)
-
Spring Security
Serialization Libraries
-
High Performance data structures and utility methods for Java
-
A modern and feature-rich Asynchronous Java client for Google Cloud Datastore
-
a flexible metric forwarding agent
-
Benchmark comparing serialization libraries on the JVM
-
MessagePack serializer implementation for Java / msgpack.org[Java]
-
Java serialization library, proto compiler, code generator
-
Java implementation of the Sparkey key value store
Server Libraries
-
The JVM core for Couchbase SDKs.
-
The Java gRPC implementation. HTTP/2 based RPC
-
Eclipse Jetty® - Web Container & Clients - supports HTTP/2, HTTP/1.1, HTTP/1.0, websocket, servlets, and more
Single Sign-On (SSO) Libraries
-
An OpenID Connect reference implementation in Java on the Spring platform.
-
Java SDK for Okta Resource Management
-
Bridge from the pac4j security library to Spring Security (reactive)
Speech Recognition Libraries
-
MARY TTS -- an open-source, multilingual text-to-speech synthesis system written in pure java
Storage Libraries
-
Apache Commons VFS
-
MinIO Client SDK for Java
-
Apache Nutch is an extensible and scalable web crawler
-
Apache Parquet
-
Apache Pulsar - distributed pub-sub messaging system
Storage and File System Libraries
-
阿里云计算平台DataWorks(https://help.aliyun.com/document_detail/137663.html) 团队出品，为监控而生的数据库连接池
Styling Libraries
-
One way to present a set of actions to a user is with bottom sheets, a sheet of paper that slides up from the bottom edge of the screen. Bottom sheets offer flexibility in the display of clear and simple actions that do not need explanation.
-
A beautiful Android custom seekbar, which has a bubble view with progress appearing upon when seeking. 自定义SeekBar，进度变化更以可视化气泡样式呈现
-
Material Intro View is a showcase android library.
-
An page indicator for Android ViewPager
-
A custom ViewPager title strip which gives continuous feedback to the user when scrolling
-
Set of extra Transitions on top of Jetpack Transitions Library
-
Create an awesome About Page for your Android App in 2 minutes
-
A library to bring fully animated Material Design components to pre-Lolipop Android.
-
Modular and customizable Material Design UI components for Android
System Monitoring Libraries
-
Prometheus instrumentation library for JVM applications
-
Insight Engineering Platform Components
-
An application observability facade for the most popular observability tools. Think SLF4J, but for observability.
Template Engine Libraries
-
A functional reactive framework for managing state evolution and side-effects.
-
Java Template Engine
-
Thymeleaf is a modern server-side Java template engine for both web and standalone environments.
-
Mustache/handlebars templating engine in Java.
Templates Libraries
-
Apache Freemarker
-
Mirror of Apache Velocity Engine
Testing Libraries
-
Awaitility is a small Java DSL for synchronizing asynchronous operations
-
Cucumber for the JVM
-
A programmer-oriented testing framework for Java.
-
Java DSL for easy testing of REST services
-
A browser automation framework and ecosystem.
-
Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.
-
A tool for mocking HTTP services
Text Processing Libraries
-
Stanford CoreNLP: A Java suite of core NLP tools.
-
Word2Vec Java Port
-
KNIME Analytics Platform
-
Apache Lucene open-source search software
Text and Rich Content Libraries
-
Efficiently create compact tree layouts in Java
Third-party API Integration Libraries
-
Java SDK for PayPal RESTful APIs
-
Alibaba Cloud SDK for Java
-
The Box SDK for Java.
-
Coinbase API v1 library for Java
-
Evernote SDK for Java
-
Java SDK for Facebook Ads APIs
-
Google APIs Client Library for Java
-
A Java HTTP client for consuming Twitter's realtime Streaming API
-
LINE Messaging API SDK for Java
-
Uber Rides Java SDK (beta)
-
A Java library for communicating with the Twilio REST API and generating TwiML.
Time-series Databases
-
The Chronix Server implementation that is based on Apache Solr.
-
A scalable, distributed Time Series Database.
Utility Libraries
-
jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.
-
A programmer-oriented testing framework for Java.
Version Control and Git Libraries
-
pure java git solution
-
Provides examples and code snippets for the JGit Java Git implementation
-
Sonatype Nexus Repository Manager; Open-source codebase mirror
-
SiteWhere is an industrial strength open-source application enablement platform for the Internet of Things (IoT). It provides a multi-tenant microservice-based infrastructure that includes device/asset management, data ingestion, big-data storage, and integration through a modern, scalable architecture. SiteWhere provides REST APIs for all system functionality. SiteWhere provides SDKs for many common device platforms including Android, iOS, Arduino, and any Java-capable platform such as Raspberry Pi rapidly accelerating the speed of innovation.
-
ZeroTurnaround Process Executor
Video Libraries
-
Java wrapper around the FFmpeg command line tool
-
JCodec main repo
-
GStreamer-based video library for Processing
Virtual Reality Libraries
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Android OpenGL ES 2.0/3.0 Engine
Virtualization Libraries
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Java client for Kubernetes & OpenShift
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Java samples, language bindings, and API reference documentation for vSphere, VMC, and NSX-T using the VMware REST API
Voice Libraries
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MARY TTS -- an open-source, multilingual text-to-speech synthesis system written in pure java
Web Crawling Libraries
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A set of reusable Java components that implement functionality common to any web crawler
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HtmlUnit is a "GUI-Less browser for Java programs".
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Apache Nutch is an extensible and scalable web crawler
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A browser automation framework and ecosystem.
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Collection of reusable loosely Selenium-related code - see https://github.com/sergueik/selenium_tests for strict Selenium test code examples
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The Apache Tika toolkit detects and extracts metadata and text from over a thousand different file types (such as PPT, XLS, and PDF).
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Yet Another UserAgent Analyzer
Web Frameworks
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Vaadin 6, 7, 8 is a Java framework for modern Java web applications.
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Mirror of Apache Struts
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Apache Wicket - Component-based Java web framework
Web Scraping Libraries
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A set of reusable Java components that implement functionality common to any web crawler
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HtmlUnit is a "GUI-Less browser for Java programs".
WebRTC Libraries
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Ant Media Server is a live streaming engine software that provides adaptive, ultra low latency streaming by using WebRTC technology with ~0.5 seconds latency. Ant Media Server is auto-scalable and it can run on-premise or on-cloud.
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OpenVidu Platform main repository
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The goal of this project is to allow integrated or USB-connected webcams to be accessed directly from Java. Using provided libraries users are able to read camera images and detect motion. Main project consist of several sub projects - the root one, which contains required classes, build-in webcam driver compatible with Windows, Linux and Mac OS, which can stream images as fast as your camera can serve them (up to 50 FPS). Main project can be used standalone, but user is able to replace build-in driver with different one - such as OpenIMAJ, GStreamer, V4L4j, JMF, LTI-CIVIL, FMJ, etc.
WebSocket Libraries
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A barebones WebSocket client and server implementation written in 100% Java.
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Event Driven WebSockets Framework with Cross-Browser Fallbacks
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High-quality WebSocket client implementation in Java.
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HTTP web applications for Vert.x
Workflow Orchestration Engines
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Extensible Scheduler for Mesos Frameworks
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Activiti Cloud libraries and Spring Boot starters.
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Flexible framework for workflow and decision automation with BPMN and DMN. Integration with Spring, Spring Boot, CDI.
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A compact and highly efficient workflow and Business Process Management (BPM) platform for developers, system admins and business users.
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Sample application demonstrating an order fulfillment system decomposed into multiple independant components (e.g. microservices). Showing concrete implementation alternatives using e.g. Java, Spring Boot, Apache Kafka, Camunda, Zeebe, ...
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Kestra is an infinitely scalable orchestration and scheduling platform, creating, running, scheduling, and monitoring millions of complex pipelines.
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Netflix's distributed Data Pipeline
XML Libraries
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flexible XML framework for Java
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Genson a fast & modular Java <> Json library
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Extension for Jackson JSON processor that adds support for serializing POJOs as XML (and deserializing from XML) as an alternative to JSON
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Jaxb RI
YAML Libraries
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MATURE: A set of Maven tools for dealing with Dockerfiles
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An annotation-based Java library for creating Thrift serializable types and services.
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Uber-project for standard Jackson binary format backends: avro, cbor, ion, protobuf, smile
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Uber-project for (some) standard Jackson textual format backends: csv, properties, yaml (xml to be added in future)
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Quarkus: Supersonic Subatomic Java.
ZIP and Compression Libraries
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A port of Snappy, LZO, LZ4, and Zstandard to Java
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Apache Commons Compress
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LZ4 compression for Java
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[NOT MAINTAINED ANYMORE] LZMA library for Java
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Snappy compressor/decompressor for Java