Desktop/Android/HTML5/iOS Java game development framework
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
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..
Binary Conversion Calculator
Ground-Up rewrite of MekWars
Develop an emulated Darkfall Online Server.
Free open source game created in Unity 3d for Windows 64 bits
PC-98 emulator for Android phones
Gameboy Advance emulator for Android phones
Open Source Virtual World and MMOG Development Platform
NES emulator for Android phones
Gameboy and Gameboy Color emulator for Android phones
AMOS BASIC reimplementation in Java