3D .NET engine for Windows, Linux, Mac
3D Game Engine
Open Game Bootstrap
An advanced flexible game engine for Java.
Mahasona engine is an open source game engine.
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Multimedia asset management and manipulator for Étoilé
Cross-platform C framework very compact libraries and tools.
a game library to develop audio games
A 2D Adventure Game & Engine
A mobile tower 3D tower defense/defend the flag game
A world editor for HGE game engine written in python and uses OpenGL.
Kinect based controller.
3D Interactive sandbox environment
A 3D, fully concurrent game engine
A cross-platform game framework based on OpenGL and GObject.
3D game engine for C and C++
Scriptable frontend for media applications.
A graphics engine + toolkit.