3D .NET engine for Windows, Linux, Mac
Open Game Bootstrap
Create symmetric sprites: browse, save to PC, or store online
evolution for vegastrike SpaceSim/Combat/Trade game
Free strategy browsergame engine.
Gives agents personality, moods, emotions and emotional attachments.
Cross-platform C framework very compact libraries and tools.
A generic 2D engine for any kind of game
Modular Gaming Open Source Persistent Browser Based Game Framework
C++ Framework for slot machine games
Open Source Virtual World and MMOG Development Platform
cross-platform 2d game engine
CLM for Joomla! 1.5 + 2.5
Moteur de jeux de rôles descripifs (RP) en PHP
A cross-platform OpenGL based lightweight scenegraph library
Cross-platform 2D game engine
AMOS BASIC reimplementation in Java
A cross platform 3d c++ game engine
also download updates from files section
Read and write PGN format and test moves for legality.
Basic real-time simulation engine in C++