Quake PAK file utility
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
Single-/multi-player card game Mau Mau (similar to UNO®)
3D Game Engine
Mahasona engine is an open source game engine.
Multimedia asset management and manipulator for Étoilé
Multi-threaded 2D Renderer licensed under the Mozilla Public License
A mobile tower 3D tower defense/defend the flag game
C++ Framework for slot machine games
3D game engine for C and C++
A truly extensible cross-platform game engine
A very small multi-platform game engine for creating desktop games.
Pear3DEngine is a modern and modular 3D development framework
C++ Game programming Framework
Moteur de jeux de rôles descripifs (RP) en PHP
A cross-platform OpenGL based lightweight scenegraph library
A cross platform 3d c++ game engine
Basic real-time simulation engine in C++
Read and write PGN format and test moves for legality.