Pentaho Data Integration ( ETL ) a.k.a Kettle
ProGuard, Java optimizer and obfuscator
Programmer-friendly testing framework for Java and the JVM
A distributed single-sign-on framework
Most popular Mocking framework for unit tests written in Java
Java version of the Playwright testing and automation library
Soot - A Java optimization framework
China's first CTFTools framework
Java language binding for writing Appium Tests
Nepxion Discovery is a solution for Spring Cloud
Spring Boot starter module for gRPC framework
The Enterprise-ready testing and specification framework
Native Android app for Habitica
Simple Binary Encoding (SBE) - High Performance Message Codec
Socket.IO server implemented on Java
Fast dependency injector for Android and Java
Reactive library to enable quick and easy development of bots
A Spring Cloud based Service Governance Framework
Android Permissions Framework, Adapt to Android 16
SDL library for Android, including several games.
iDempiere. Community Powered Enterprise
An object relational-mapping (ORM) library for Java
Arianne is an engine to develop multiplayer online games like Stendhal