Game/Scene Development System
A free 3D game engine to create games and realtimes scenes for Windows
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
A 2D game engine and level editor
A cross platform Lua based game engine
Open-source, cross-platform, C++ game engine for creating 2D/3D games
2D game engine for traditional platform games
Open Game Bootstrap
Mahasona engine is an open source game engine.
A generic 2D engine for any kind of game
3D game engine for C and C++
A game development kit for Sifteo Cubes.
Pear3DEngine is a modern and modular 3D development framework
A cross platform 3d c++ game engine
A cross-platform OpenGL based lightweight scenegraph library
A DirectX based graphics/physics engine
The Lambda-Engine is a cross platform game engine.
C++ SDL/Box2d Programming