Arianne is an engine to develop multiplayer online games like Stendhal
A simple cross-platform game engine for creating old-school 2D games
CSG for jMonkey
X3D Prototypes for the SMUOS Component
Free strategy browsergame engine.
Java Gamepad API for multiple platforms
NinYawg Adventure
Decodes the login credentials stored by the minecraft launcher
Framework for a graphical point and click adventure game in Java
AMOS BASIC reimplementation in Java
A cross-platform Java 2D graphics library using OpenGL.
Modular Game Creation Framework.