A generic 2D engine for any kind of game
3D Game engine
C++ Framework for slot machine games
A truly extensible cross-platform game engine
Open Source Virtual World and MMOG Development Platform
cross-platform 2d game engine
Investigo - DX9 Performance and Debugging Toolkit
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
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Read and write PGN format and test moves for legality.