Desktop/Android/HTML5/iOS Java game development framework
Orx: Data-Driven Game Engine
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Cross-platform 2D and 3D game engine
A 2D game engine and level editor
Portable game engine with main focus on point-and-click adventures
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Open-source, cross-platform, C++ game engine for creating 2D/3D games
Open Game Bootstrap
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Cross-platform C framework very compact libraries and tools.
3D Game engine
cross-platform 2d game engine
A cross-platform OpenGL based lightweight scenegraph library
Cross-platform 2D game engine
A cross platform 3d c++ game engine
A small Game Engine project.