SonarSource Static Analyzer for Java Code Quality and Security
Desktop/Android/HTML5/iOS Java game development framework
Native Android app for Habitica
Arianne is an engine to develop multiplayer online games like Stendhal
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Growth-grammar related Interactive Modelling Platform
JPHP - an implementation of PHP on Java VM
8-bit Graphical API for Java
Easy fine console input/output for java
Map Generation Application and API
Multi scripts for CS:GO that do just about everything
Mobile Suite is a set of J2ME midlets with a common UI
Create units and attacks for Wesnoth!
Code Difference report
Programming Game, A Practice Tool for Building Intelligent Things
A software to craft easily your own Minecraft mod, without coding
AMOS BASIC reimplementation in Java