Free and open source real-time strategy game
Free, open source game engine online
Chess training program playing gambits
Java Settlers
A math flashcard-like game
A Dart game count and practicing software written in JAVA
Quiz Game SWT
Programming Game, A Practice Tool for Building Intelligent Things
Java Game, Simple 2d, for Practice and Examples
Practice your English (or any other language) with your favorite songs
Networked training tool for Air Traffic Controllers