Desktop/Android/HTML5/iOS Java game development framework
Gideros Release version
Java Settlers
8-bit Graphical API for Java
Source code of the chapters of the book 3D Game Development with LWJGL
Example code for creating a 2D platform game in Java.
Open Source Virtual World and MMOG Development Platform
AMOS BASIC reimplementation in Java
The next generation mud is an open-source extensible, programmable mud