Discover Japan's Leading Open Source Projects: Explore top-notch open source initiatives hailing from the vibrant tech community of Japan.
lloydmeta/enumeratum
A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations.yahoojapan/objc2swift
Open Source Obj-C to Swift Converter.seratch/AWScala
Using AWS SDK on the Scala REPLtototoshi/scala-csv
CSV Reader/Writer for Scalanulab/scala-oauth2-provider
OAuth 2.0 server-side implementation written in Scalafosskers/scalaz-and-cats
Usage examples and benchmarks between Scalaz and Cats (w/ Haskell ground-truth).scala-text/scala_text
Scala学習用テキストaselab/scala-activerecord
ActiveRecord-like ORM library for Scalaktoso/akka-raft
A toy project implementing RAFT on top of Akka Cluster (not prod ready)tototoshi/slick-joda-mapper
Slick with JodaTimebizreach-inc/play2-hands-on
Play2 + Slick / ScalikeJDBCを使ってWebアプリケーションを作成するハンズオンです。atware/scuruto
An internal knowledge sharing appkxbmap/configs
Scala wrapper for Typesafe configTanUkkii007/akka-cluster-custom-downing
akka-cluster-custom-downing provides configurable auto-downing strategy you can choose based on your distributed application design.mumoshu/play2-memcached
A memcached plugin for Play 2.xm3dev/octoparts
Octoparts, the backend services aggregatorcrossroad0201/ddd-on-scala
DDD sample implementation by Scala.kogecoo/dl4j-examples-scala
[NO LONGER MAINTAINED] a simple scala porting of https://github.com/deeplearning4j/dl4j-examplesokumin/akka-persistence-sql-async
A journal and snapshot store plugin for akka-persistence using RDBMS.lloydmeta/diesel
Boilerplate-free, zero-overhead Tagless Final / typed-final / Finally Tagless DSLs in Scalalloydmeta/schwatcher
File-watching library for Scala. Built on Java 7's WatchService, RxScala and Akka actors.maropu/spark-tpcds-datagen
All the things about TPC-DS in Apache Sparkreibitto/command-center
A CLI-based launcher and general productivity tool.xuwei-k/sbt-class-diagram
sbt plugin to create a class diagramGiganticMinecraft/SeichiAssist
ギガンティック☆整地鯖の独自要素を司るプラグイン / A Minecraft(Spigot) Plugin used for Gigantic Seichi Server. Address -> play.seichi.clickyoshikyoto/lgtmoon
LGTM画像を簡単に作成できるアプリponkotuy/MyFleetGirls
KanColle Public View Toolakisaarinen/rillit
Boilerplate-free Functional Lenses for Scala 2.10ktoso/sbt-jol
Don't guess JVM object sizes. Get them on a silver platter.tototoshi/play-flyway
Flyway plugin for Play >= 2.1klassic/klassic
Klassic is A Programming Language which enables Object-Functional Programmingj5ik2o/akka-ddd-cqrs-es-example
Bank API CQRS Event Sourcing System on Akka-Cluster (Concept Model)maropu/spark-sql-flow-plugin
Visualize column-level data lineage in Spark SQLfozziethebeat/TopicModelComparison
Scripts and codes for replicating experiments published in Exploring Topic Coherence over many models and many topicsreibitto/sbt-welcome
An SBT plugin for displaying a welcome message and commonly used tasks.Project-ShangriLa/sora-playframework-scala
Anime API Server. (Play Framework. Scala)todokr/zugen
An architecture diagram generator for Scala project.lloydmeta/slim-play
Slim Play appmumoshu/play2-typescript
TypeScript assets handling for Play 2.0. Compiles .ts files under the /assets dir along with the project.mnogu/gatling-kafka
A Gatling stress test plugin for Apache Kafka protocolxuwei-k/httpz
purely functional http client with scalaz.Freefosskers/scala-benchmarks
An independent set of benchmarks for testing common Scala idioms.xuwei-k/grpc-scala-sample
translated from grpc java examples with ScalaPBtototoshi/sbt-musical
NO MUSIC, NO BUILD. Enjoy your compile time.xuwei-k/unused-code
find and remove unused scala codektoso/scala-rainbow
Super simple terminal output colorizing for Scalakiszk/spark-gpu
Spark GPU and SIMD Supportopt-tech/redshift-fake-driver
A jdbc driver emulates redshift specific commands.okapies/finagle-kafka
An Apache Kafka client in Netty and Finagle.tarao/record4s
Extensible records for Scalapotix2/spark-google-spreadsheets
Google Spreadsheets datasource for SparkSQL and DataFramestarao/bullet-scala
A monadic library to resolve object relations with the aim of avoiding the N+1 query problem.rhysd/riscv32-cpu-chisel
Learning how to make RISC-V 32bit CPU with Chiseltototoshi/play-json4s
seratch/scalikesolr
Apache Solr Client for Scala/Javatototoshi/play-json-naming
Custom naming convention for play-json to map snake_case json to camelCase case classesognis1205/spark-tda
SparkTDA is a package for Apache Spark providing Topological Data Analysis Functionalities.reibitto/podpodge
Convert YouTube playlists to audio-only RSS feeds for podcast apps to consume.scala-text/S99
S99の解答例okomok/sing
Type-Level Metaprogramming Library in Scalaktoso/akka-persistence-hbase
An HBase backed Journal for Akka's experimental persistence / event-sourcingeverpeace/kafka-reassign-optimizer
Kafka Partitions Re-Assignment Optimizer in scalaj5ik2o/ticket-price-modeling
lloydmeta/rhodddoobie
My little sandbox for playing around with the FP + OOP + DDD combination, in particular using Rho, doobie, Docker, testing, etc in a project.mnogu/gatling-mqtt
A Gatling stress test plugin for MQTTpanda5mt/KyogenRV
The Simple 5-staged pipeline RISC-V written in chisel3 for intel FPGA.j5ik2o/scala-ddd-base
scala-ddd-base provides traits to support for ddd repositories and aggregates.halcat0x15a/kits
A lightweight library for functional programming.TsingJyujing/GeoScala
A geo library written by Java and Scalareibitto/be-kind-rewind
A VCR testing library for Scalakmizu/jsonda
A DSL for constructing json-like data sturcturestanishiking/scalaunfmt
Generates the .scalafmt.conf that have minimum change to existing your scala codebase on running scalafmt.tanishiking/scala-wasm
Experimental WasmGC backend for Scala.js | merging into the upstream Scala.js repo https://github.com/scala-js/scala-js/pull/4988mmizutani/sbt-play-gulp
Gulp asset pipeline for Play Frameworktodokr/sbt-project-switcher
A sbt plugin to switch project in a snappy way⚡️dennybritz/deepdive
chatwork/scala-quiz
everpeace/ml-examples-by-scalala
Machine Learning Algorithms Samples By Scalalaxuwei-k/nobox
immutable primitive array/NonEmptyArray wrapper for Scalaseratch/bigquery4s
A handy Scala wrapper of Google BigQuery API 's Java Client Library.exoego/aws-sdk-scalajs-facade
A complete set of Scala.js type facade for aws-sdk-jspaidy/interview
Interview challenge for potential candidates.maropu/spark-sql-server
Yet Another Spark SQL JDBC/ODBC server based on the PostgreSQL V3 protocoltarao/lambda-scala
Type level lambda calculus in Scalaktoso/akka-http-mini-workshop
xuwei-k/scalafix-rules
scalafix rulesmizzy/scala-design-patterns
mshibuya/cloudformal
A type-safe CloudFormation DSL, which you can apply changes casually!nus/gitbucket-plantuml-plugin
A GitBucket plugin that renders PlantUML diagrams.crossroad0201/flyway-awslambda
AWS Lambda function for RDS migration using Flyway.trknhr/akka-http-realworld-example
Exemplary real world application built with Scala + Akka HTTP https://realworld.iomaropu/hivemall-spark
A Hivemall wrapper for SparkNomadBlacky/scaladog
Datadog API client for Scala.j5ik2o/akka-persistence-dynamodb
akka-persistence(journal, snapshot, state) plugin for AWS DynamoDBtakapi327/ldbc
ldbc is Pure functional JDBC layer with Cats Effect 3 and Scala 3.sonoisa/Prolog-in-Scala
A Prolog Implementation(Internal DSL, External DSL, REPL) in Scala.yoshiyoshifujii/gitbucket-commitgraphs-plugin
tyagihas/scala_nats
Scala client implementation for NATS messaging systemj5ik2o/reactive-aws-clients
AWS Client libraries for Scala (Automatic generation from AWS source code)watermint/Fextile
Twitter Bootstrap like UI framework for JavaFX.Love Open Source and this site? Check out how you can help us