This list gathers rendering, physics and game engines:
- Delta3D: game engine
- NeoEngine: game engine
- Irrlicht: 3D rendering engine
- OGRE: 3D rendering engine
- Speex: patent-free audio compression format designed for speech
- Bullet: physics engine
- Power Render: 3D rendering engine
- Crystal Space: 3D rendering engine
- Genesis3D: 3D rendering engine