Desktop/Android/HTML5/iOS Java game development framework
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
3D Engine c++
GemRB is a portable open-source implementation of the Infinity Engine
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
3D modeler, 3D game maker, 3D demo maker
Cinema Enters Game Console
ZED OS the clone of Windows XP
Character animation system for games and simulations.
Children's learning programming language Karel the Robot in 3D
Asphyre is a cross-platform framework for Delphi and FreePascal.
3D .NET engine for Windows, Linux, Mac
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Visual Novel engine, editor and game development.
An Action Adventure Space Physics Game
PixelLight is a cross-platform application framework
A cross-platform OpenGL based lightweight scenegraph library