RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

Desktop/Android/HTML5/iOS Java game development framework

The official home of the Presto distributed SQL query engine for big data

Arduino IDE 1.x

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 mat…

Zuul is a gateway service that provides dynamic routing, monitoring, resiliency, security, and more.

Apache Druid: a high performance real-time analytics database.

Continuous Inspection

Distributed and fault-tolerant realtime computation: stream processing, continuous computation, distributed RPC, and more

A programmer-oriented testing framework for Java.

A damn simple library for building production-ready RESTful web services.

Test Automation Made Simple

A Java to iOS Objective-C translation tool and runtime.

A splash screen for react-native, hide when application loaded ,it works on iOS and Android.

Apache Pinot - A realtime distributed OLAP datastore

Install and run GNU/Linux on Android

Digital logic design tool and simulator

LWJGL is a Java library that enables cross-platform access to popular native APIs useful in the development of graphics (OpenGL, Vulkan, bgfx), audio (OpenAL, Opus), parallel computing (OpenCL, CUD…

Bring some 12 factor love to your mobile apps!

Open-Source Subscription Billing & Payments Platform

CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries. It is PostgreSQL-compatible, and based on Lucene.

Bitcoin Wallet app for your Android device. Standalone Bitcoin node, no centralized backend required.

High performance non-blocking webserver

Bastillion is a web-based SSH console that centrally manages administrative access to systems. Web-based administration is combined with management and distribution of user's public SSH keys.

Add-ons for openHAB

Ninja is a full stack web framework for Java. Rock solid, fast and super productive.

Open-source weight and body metrics tracker, with support for Bluetooth scales

Embulk: Pluggable Bulk Data Loader.

The ToroDB solution to provide better analytics on top of MongoDB and make it easier to migrate from MongoDB to SQL

Rapidoid - Extremely Fast, Simple and Powerful Java Web Framework and HTTP Server!