Game engine supporting many 3D/2D formats and graphic effects
Reusable code for building video games with Jogamp NEWT
Open game and rendering engine packed into a JavaScript framework
Amateur 3D Game Engine
Self-hosted CMS platform based on the Laravel PHP Framework
A free 3D game engine to create games and realtimes scenes for Windows
Vivid3D is an open-source 3D engine with powerful 2D UI.
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Modern 3D engine and IDE written using C# and C++.
A 2D game engine and level editor
Source code of the chapters of the book 3D Game Development with LWJGL
3D .NET engine for Windows, Linux, Mac
.NET - VISUAL BASIC NVIDIA +ATI PHYSX SLIMDX DIRECTX 9 -ENGINE/WRAPPER
XNA based game engine completely written in c#
Cross-platform C framework very compact libraries and tools.
A generic 2D engine for any kind of game
3D Game engine
A game development kit for Sifteo Cubes.
Open Source Virtual World and MMOG Development Platform
A cross platform 3d c++ game engine
A cross-platform OpenGL based lightweight scenegraph library