2010
2009
nGene Tech Engine
Another free game engine
2007
PAL : Physics Abstraction Layer
An physics engine abstraction layer
JigLib - Rigid Body Physics Engine
A rigid body physics engine
Engine + gameDev
Contains a list of game engine
Mega System
CRM32Pro is an API built on top of SDL with everything you need to develop cross-platform 2D games: tiles, sprites, fonts, special effects, sound, music, timer, network, log system, video playback, XML parser, etc.
Irrklang
A free sound engine
Aquatica Engine
An water rendering engine which used to render photo realistic water surface. It is only $15 for commercial liscense
Sylphis 3D
Another 3D game engine
Cd3D Engine
Ca3D Engine is another 3D engine.
Arkham Development 3D Engine
Arkham 3D engine. Another 3D engine that written in OpenGL
Cadabra 3D Game Engine
Another homebrew game engine. Not bad!
2006
Luxinia 3D Engine
Luxinia is a 3D engine written in C that uses OpenGL, Lua, GLFW and OpenAL.
NeoAxis Engine
NeoAxis Engine. Another game engine. Seems have pretty cool development.
Real Matter Physics Engine
A physics Engine which focus on Soft body animation
Horde3D - Next Generation Graphics Engine
Another open soruce Next Generation Graphics Engine
XEngine
XEngine Project Homepage
The Nebula Device
by 1 otherThe leading Open Source 3D game and visualisation engine used in dozens of commercial games and professional visualisation applications released worldwide
Kjapi 3D Game Engine
Kjapi 3D Game Engine
Realm Crafter MMORPG Engine
The realm crafter engine allows you to design, create and publish your very own MMORPG game
Apocalyx Game Engine
APOCALYX is a 3D engine written in C++ that uses the OpenGL API, OpenAL, Lua and other open source libraries.
Bullet Physics Engine
Another physics engine which is free to use
