From BlenderWiki
- Crystalspace - LGPL - has direct support for Blenders .blend files and game logic
- see blender2crystal for converter documentation
- Delta3D - LGPL - Americas Army is based on it
- Ogre3D - LGPL - has good support for Blender exporters
- Irrlicht - zlib/libpng License - has support for Blender exporters
- popular engine overview - offers a brief overview of some of the more prominent opensource and closed source engines
- 3D game engine database - offers in depth descriptions and overviews of commercial and opensource game engines
- A massive list of game engines - only covers those from 2000 or prior
- ComparisonTable - A small comparison table done from a Blender perspective by antont
[edit] Collision detection & Game Physics
- Bullet Physics Engine - Zlib license - Free for commercial use, multiplatform, COLLADA Physics support, convex and concave collision shapes.
- Open Dynamics Engine - GPL / BSD license - Free for commercial use, multiplatform, most collision shapes except proper convex hull integration. Optionally using OPCODE and GIMPACT collision detection. Active mailinglist for user support.
