Help out your favorite open source projects and become a better developer while doing it.

A better compressed bitset in Java

A scalable, distributed Time Series Database.

Test Automation Made Simple

A Maven plugin that uses Asciidoctor via JRuby to process AsciiDoc source files within the project.

光 HikariCP・A solid, high-performance, JDBC connection pool at last.

Yet Another vijava. A fork of vijava http://sourceforge.net/p/vijava/

AppLock

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

An easy and simple open source xkcd reader

A testing framework for automatically finding and simplifying bugs in graphics shader compilers.

Sniffy - interactive profiler, testing and chaos engineering tool for Java

Realtime Client Server Framework for the JVM, supporting WebSockets with Cross-Browser Fallbacks

Spring integration for Metrics

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.

Lean & powerful HTTP apps

A source-only C++ package manager that will take you to your happy place 🏝️

FastHub the ultimate GitHub client for Android.

A decentralized bitcoin exchange network

EnvFile 3.0 is a plugin for JetBrains IDEs that allows you to set environment variables for your run configurations from one or multiple files.

Expose eclipse features inside of vim.

Java based open source static site/blog generator for developers & designers.

Elixir plugin for JetBrain's IntelliJ Platform (including Rubymine)

Realm is a mobile database: a replacement for SQLite & ORMs

Open Source LaTeX editor that supports remote collaboration

AIMSICD • Fight IMSI-Catcher, StingRay and silent SMS!

The core API of the NOVA voxel game modding system

The Esteemed Innovation mod for Minecraft focused around steam power tech and innovative content. Formerly known as Flaxbeard's Steam Power.

Open IoT Framework

a FindBugs/SpotBugs plugin for doing static code analysis for java code bases

A JSON Schema validation implementation in pure Java, which aims for correctness and performance, in that order

Glucosio Android App

A fast dependency injector for Android and Java.

PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.

"Maven-node-grunt-gulp-npm-node-plugin to end all maven-node-grunt-gulp-npm-plugins." A Maven plugin that downloads/installs Node and NPM locally, runs NPM install, Grunt, Gulp and/or Karma.

Java natural language date parser

An open source GitHub Android client app, faster and concise.

ImageJ Ops: "Write once, run anywhere" image processing

A plugin framework and application container with built-in extensibility mechanism :electric_plug:

H2 is an embeddable RDBMS written in Java.

A fast, customizable and compatible open source server for Minecraft: Java Edition

Advanced Scripting IDE for JVM based languages.

sql2o is a small library, which makes it easy to convert the result of your sql-statements into objects. No resultset hacking required. Kind of like an orm, but without the sql-generation capabilities. Supports named parameters.

Wrapper of syncthing for Android.

PocketHub Android App

Most popular Mocking framework for unit tests written in Java

Automatically exported from code.google.com/p/flex-ui-selenium

An extensible media player for Android

Yet Another Report Generator - CUBA Platform reporting engine

A tool for running android and iOS appium tests in parallel across devices... U like it STAR it !

QuickPerf is a testing library for Java to quickly evaluate and improve some performance-related properties