๐Ÿ‡ฉ๐Ÿ‡ช Made in Germany

Discover Germany's Leading Open Source Projects: Explore top-notch open source initiatives hailing from the vibrant tech community of Germany.

TOP Java Projects

1
greenrobot/EventBus

greenrobot/EventBus

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.
Java
24,647
star
2
JetBrains/intellij-community

JetBrains/intellij-community

IntelliJ IDEA Community Edition & IntelliJ Platform
Java
17,135
star
3
android10/Android-CleanArchitecture

android10/Android-CleanArchitecture

This is a sample app that is part of a series of blog posts I have written about how to architect an android application using Uncle Bob's clean architecture approach.
Java
15,521
star
4
hdodenhof/CircleImageView

hdodenhof/CircleImageView

A circular ImageView for Android
Java
14,550
star
5
greenrobot/greenDAO

greenrobot/greenDAO

greenDAO is a light & fast ORM solution for Android that maps objects to SQLite databases.
Java
12,626
star
6
codecentric/spring-boot-admin

codecentric/spring-boot-admin

Admin UI for administration of spring boot applications
Java
12,343
star
7
cryptomator/cryptomator

cryptomator/cryptomator

Cryptomator for Windows, macOS, and Linux: Secure client-side encryption for your cloud storage, ensuring privacy and control over your data.
Java
11,740
star
8
k0shk0sh/FastHub

k0shk0sh/FastHub

FastHub the ultimate GitHub client for Android.
Java
5,706
star
9
sockeqwe/mosby

sockeqwe/mosby

A Model-View-Presenter / Model-View-Intent library for modern Android apps
Java
5,489
star
10
vavr-io/vavr

vavr-io/vavr

vสŒvr (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.
Java
5,354
star
11
gunnarmorling/1brc

gunnarmorling/1brc

1๏ธโƒฃ๐Ÿ๐ŸŽ๏ธ The One Billion Row Challenge -- A fun exploration of how quickly 1B rows from a text file can be aggregated with Java
Java
5,179
star
12
rubensousa/GravitySnapHelper

rubensousa/GravitySnapHelper

A SnapHelper that snaps a RecyclerView to an edge.
Java
4,987
star
13
ververica/flink-cdc-connectors

ververica/flink-cdc-connectors

CDC Connectors for Apache Flinkยฎ
Java
4,956
star
14
nisrulz/android-tips-tricks

nisrulz/android-tips-tricks

โ˜‘๏ธ [Cheatsheet] Tips and tricks for Android Development
Java
4,680
star
15
objectbox/objectbox-java

objectbox/objectbox-java

Android Database - first and fast, lightweight on-device vector database
Java
4,365
star
16
hneemann/Digital

hneemann/Digital

A digital logic designer and circuit simulator.
Java
4,249
star
17
camunda/camunda-bpm-platform

camunda/camunda-bpm-platform

Flexible framework for workflow and decision automation with BPMN and DMN. Integration with Quarkus, Spring, Spring Boot, CDI.
Java
4,070
star
18
rubensousa/ViewPagerCards

rubensousa/ViewPagerCards

ViewPager cards inspired by Duolingo
Java
4,065
star
19
ikarus23/MifareClassicTool

ikarus23/MifareClassicTool

An Android NFC app for reading, writing, analyzing, etc. MIFARE Classic RFID tags.
Java
3,913
star
20
JabRef/jabref

JabRef/jabref

Graphical Java application for managing BibTeX and biblatex (.bib) databases
Java
3,590
star
21
kikoso/android-stackblur

kikoso/android-stackblur

Android StackBlur is a library that can perform a blurry effect on a Bitmap based on a gradient or radius, and return the result. The library is based on the code of Mario Klingemann.
Java
3,585
star
22
rubensousa/PreviewSeekBar

rubensousa/PreviewSeekBar

A SeekBar suited for showing a preview of something. As seen in Google Play Movies.
Java
3,437
star
23
openhab/openhab1-addons

openhab/openhab1-addons

Add-ons for openHAB 1.x
Java
3,427
star
24
JFormDesigner/FlatLaf

JFormDesigner/FlatLaf

FlatLaf - Swing Look and Feel (with Darcula/IntelliJ themes support)
Java
3,365
star
25
mbechler/marshalsec

mbechler/marshalsec

Java
3,326
star
26
gouthampradhan/leetcode

gouthampradhan/leetcode

Leetcode solutions
Java
3,248
star
27
TNG/ArchUnit

TNG/ArchUnit

A Java architecture test library, to specify and assert architecture rules in plain Java
Java
3,181
star
28
camunda/camunda

camunda/camunda

Process Orchestration Framework
Java
3,177
star
29
Querz/mcaselector

Querz/mcaselector

A tool to select chunks from Minecraft worlds for deletion or export.
Java
3,154
star
30
mplushnikov/lombok-intellij-plugin

mplushnikov/lombok-intellij-plugin

Lombok Plugin for IntelliJ IDEA
Java
3,107
star
31
halirutan/IntelliJ-Key-Promoter-X

halirutan/IntelliJ-Key-Promoter-X

Modern IntelliJ plugin to learn shortcuts for buttons
Java
3,049
star
32
szerhusenBC/jwt-spring-security-demo

szerhusenBC/jwt-spring-security-demo

A demo for using JWT (Json Web Token) with Spring Security and Spring Boot 2
Java
3,043
star
33
keyboardsurfer/Crouton

keyboardsurfer/Crouton

Context sensitive notifications for Android
Java
3,010
star
34
bmelnychuk/AndroidTreeView

bmelnychuk/AndroidTreeView

AndroidTreeView. TreeView implementation for android
Java
2,994
star
35
sockeqwe/AdapterDelegates

sockeqwe/AdapterDelegates

"Favor composition over inheritance" for RecyclerView Adapters
Java
2,934
star
36
jprante/elasticsearch-jdbc

jprante/elasticsearch-jdbc

JDBC importer for Elasticsearch
Java
2,842
star
37
jjoe64/GraphView

jjoe64/GraphView

Android Graph Library for creating zoomable and scrollable line and bar graphs.
Java
2,755
star
38
sannies/mp4parser

sannies/mp4parser

A Java API to read, write and create MP4 files
Java
2,745
star
39
kabouzeid/Phonograph

kabouzeid/Phonograph

A material designed music player for Android
Java
2,728
star
40
nisrulz/sensey

nisrulz/sensey

โšก [Android Library] Play with sensor events & detect gestures in a breeze.
Java
2,676
star
41
JetBrains/skija

JetBrains/skija

Java bindings for Skia
Java
2,628
star
42
RaiMan/SikuliX1

RaiMan/SikuliX1

SikuliX version 2.0.0+ (2019+)
Java
2,623
star
43
esoxjem/MovieGuide

esoxjem/MovieGuide

Movie discovery app showcasing MVP, RxJava, Dagger 2 and Clean Architecture
Java
2,606
star
44
sergejsha/pinned-section-listview

sergejsha/pinned-section-listview

Easy to use ListView with pinned sections for Android.
Java
2,596
star
45
katzer/cordova-plugin-local-notifications

katzer/cordova-plugin-local-notifications

Cordova Local-Notification Plugin
Java
2,561
star
46
eclipsesource/J2V8

eclipsesource/J2V8

Java Bindings for V8
Java
2,432
star
47
delight-im/Android-AdvancedWebView

delight-im/Android-AdvancedWebView

Enhanced WebView component for Android that works as intended out of the box
Java
2,387
star
48
Diolor/Swipecards

Diolor/Swipecards

A Tinder-like Android library to create the swipe cards effect. You can swipe left or right to like or dislike the content.
Java
2,333
star
49
cachapa/ExpandableLayout

cachapa/ExpandableLayout

An expandable layout container for Android
Java
2,305
star
50
GCX-HCI/tray

GCX-HCI/tray

a SharedPreferences replacement for Android with multiprocess support
Java
2,292
star
51
amaembo/streamex

amaembo/streamex

Enhancing Java Stream API
Java
2,148
star
52
buchen/portfolio

buchen/portfolio

A simple tool to calculate the overall performance of an investment portfolio.
Java
2,107
star
53
julian-klode/dns66

julian-klode/dns66

DNS-based Host Blocker (and lightweight ad blocker) for Android
Java
2,105
star
54
normanmaurer/netty-in-action

normanmaurer/netty-in-action

Java
2,074
star
55
jonashackt/spring-boot-vuejs

jonashackt/spring-boot-vuejs

Example project showing how to build a Spring Boot App providing a GUI with Vue.js
Java
2,036
star
56
JetBrains/intellij-plugins

JetBrains/intellij-plugins

Open-source plugins included in the distribution of IntelliJ IDEA Ultimate and other IDEs based on the IntelliJ Platform
Java
2,002
star
57
detro/ghostdriver

detro/ghostdriver

Ghost Driver is an implementation of the Remote WebDriver Wire protocol, using PhantomJS as back-end
Java
1,915
star
58
openhab/openhab-addons

openhab/openhab-addons

Add-ons for openHAB
Java
1,873
star
59
ali-bouali/spring-boot-3-jwt-security

ali-bouali/spring-boot-3-jwt-security

Sample project on how to implement JWT security based using Spring boot 3 and Spring security 6
Java
1,803
star
60
MatthiasRobbers/shortbread

MatthiasRobbers/shortbread

Android library that creates app shortcuts from annotations
Java
1,781
star
61
janheinrichmerker/material-intro

janheinrichmerker/material-intro

A simple material design app intro with cool animations and a fluent API.
Java
1,737
star
62
nisrulz/easydeviceinfo

nisrulz/easydeviceinfo

๐Ÿ“ฑ [Android Library] Get device information in a super easy way.
Java
1,736
star
63
nisrulz/android-examples

nisrulz/android-examples

:shipit: [Examples] Simple basic isolated apps, for budding android devs.
Java
1,732
star
64
metasfresh/metasfresh

metasfresh/metasfresh

We do Open Source ERP - Fast, Flexible & Free Software to scale your Business.
Java
1,708
star
65
oliexdev/openScale

oliexdev/openScale

Open-source weight and body metrics tracker, with support for Bluetooth scales
Java
1,702
star
66
mastodon/mastodon-android

mastodon/mastodon-android

Official Android app for Mastodon
Java
1,674
star
67
majidgolshadi/Android-Download-Manager-Pro

majidgolshadi/Android-Download-Manager-Pro

Android/Java download manager library help you to download files in parallel mechanism in some chunks.
Java
1,611
star
68
paulroehr/EazeGraph

paulroehr/EazeGraph

An Android chart and graph library
Java
1,590
star
69
rubensousa/FloatingToolbar

rubensousa/FloatingToolbar

A toolbar that morphs from a FloatingActionButton
Java
1,551
star
70
flschweiger/SwipeStack

flschweiger/SwipeStack

A simple, customizable and easy to use swipeable view stack for Android.
Java
1,484
star
71
kikoso/Swipeable-Cards

kikoso/Swipeable-Cards

A native library providing a Tinder-like cards effect. A card can be constructed using an image and displayed with animation effects, dismiss-to-like and dismiss-to-unlike, and use different sorting mechanisms.
Java
1,476
star
72
android10/frodo

android10/frodo

Android Library for Logging RxJava Observables and Subscribers.
Java
1,475
star
73
leinardi/FloatingActionButtonSpeedDial

leinardi/FloatingActionButtonSpeedDial

A Floating Action Button Speed Dial implementation for Android that follows the Material Design specification (https://material.io/components/buttons-floating-action-button#types-of-transitions)
Java
1,459
star
74
GIScience/openrouteservice

GIScience/openrouteservice

๐ŸŒ The open source route planner api with plenty of features.
Java
1,442
star
75
j4velin/Pedometer

j4velin/Pedometer

Lightweight pedometer app for Android using the hardware step sensor
Java
1,434
star
76
kalessil/phpinspectionsea

kalessil/phpinspectionsea

A Static Code Analyzer for PHP (a PhpStorm/Idea Plugin)
Java
1,433
star
77
keklikhasan/LDrawer

keklikhasan/LDrawer

Android drawer icon with material design animation
Java
1,399
star
78
OpnTec/bodyapps-android

OpnTec/bodyapps-android

Bodyapps Measurement App
Java
1,394
star
79
OpnTec/ots15-companion

OpnTec/ots15-companion

Opentech Event app
Java
1,384
star
80
katzer/cordova-plugin-background-mode

katzer/cordova-plugin-background-mode

Keep app running in background
Java
1,382
star
81
OpnTec/open-event-android

OpnTec/open-event-android

Open Tech Events from around the world
Java
1,368
star
82
greenrobot/essentials

greenrobot/essentials

General purpose utilities and hash functions for Android and Java (aka java-common)
Java
1,359
star
83
d3vilbug/HackBar

d3vilbug/HackBar

HackBar plugin for Burpsuite
Java
1,350
star
84
JetBrains/JetBrainsRuntime

JetBrains/JetBrainsRuntime

Runtime environment based on OpenJDK for running IntelliJ Platform-based products on Windows, macOS, and Linux
Java
1,312
star
85
sirthias/pegdown

sirthias/pegdown

A pure-Java Markdown processor based on a parboiled PEG parser supporting a number of extensions
Java
1,290
star
86
HanSolo/tilesfx

HanSolo/tilesfx

A JavaFX library containing tiles that can be used for dashboards.
Java
1,278
star
87
mttkay/ignition

mttkay/ignition

Kick-starts Android application development.
Java
1,275
star
88
sirthias/parboiled

sirthias/parboiled

Elegant parsing in Java and Scala - lightweight, easy-to-use, powerful.
Java
1,270
star
89
bk138/droidVNC-NG

bk138/droidVNC-NG

VNC server app for Android that does not require root privileges.
Java
1,240
star
90
odrotbohm/spring-restbucks

odrotbohm/spring-restbucks

Implementation of the sample from REST in Practice based on Spring projects
Java
1,231
star
91
k0shk0sh/PermissionHelper

k0shk0sh/PermissionHelper

Android Library to help you with your runtime Permissions.
Java
1,227
star
92
michael-rapp/ChromeLikeTabSwitcher

michael-rapp/ChromeLikeTabSwitcher

Provides a tab switcher similar to the one, which is used in Google Chrome on Android
Java
1,226
star
93
berndruecker/flowing-retail

berndruecker/flowing-retail

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, ...
Java
1,221
star
94
muraee/Horizontal-Calendar

muraee/Horizontal-Calendar

A material horizontal calendar view for Android based on RecyclerView
Java
1,203
star
95
JetBrains/xodus

JetBrains/xodus

Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.
Java
1,180
star
96
andreasschrade/android-design-template

andreasschrade/android-design-template

This is a State of the Art Android Material Design template. You can use this project as a template for upcoming App projects. Just clone the project, change package name and make all necessary customisations.
Java
1,171
star
97
iotaledger/iri

iotaledger/iri

IOTA Reference Implementation
Java
1,158
star
98
thyrlian/AwesomeValidation

thyrlian/AwesomeValidation

Android validation library which helps developer boil down the tedious work to three easy steps.
Java
1,152
star
99
pvorb/npm-stat.com

pvorb/npm-stat.com

download statistics for npm packages
Java
1,131
star
100
FabianTerhorst/Isometric

FabianTerhorst/Isometric

Isometric drawing library for Android
Java
1,130
star