Open Source Virtual World and MMOG Development Platform
WIP Game engine
Game Communications Engine
A simple Text Adventure Engine.
Yet Another Chess ENgine
Mighty 34th century meka action from TeamXbow
A java-based, purely object-oriented chess engine.
cross-platform 2d game engine
"Kenny" is an XBoard/WinBoard chess engine based on "Winglet"
"Abysmal Depths" is a simple C++-based text adventure game engine.
Browser game engine
realistic truck & car simulator, with OpenGL graphics
Advanced 2D/3D(CPU,GPU) Game Engine Library
A Dungeons & Dragons Miniature Game.
Java game engine for shoot 'em ups, using Java2D.