Desktop/Android/HTML5/iOS Java game development framework
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A mapping tool for text-based games like text adventures, MUDs, etc.
MAME Android Emulator.
Easy fine console input/output for java
Open-DIS implements the IEEE DIS protocol in multiple languages.
Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..
2D physics engine for games
Develop an emulated Darkfall Online Server.