A high performance realtime 3D enginehttp://irrlicht.sourceforge.net/
The Irrlicht Engine is an open source high performance realtime 3D engine
written and usable in C++ and also available for .NET languages. It is
completely cross-platform, using D3D, OpenGL and its own software renderer,
and has all of the state-of-the-art features which can be found in
commercial 3d engines.