Rope-a-dope TECH 3D Modeling Avatar B-36 – “Peacemaker” Building an MMO Cel Shading Fallout Virtual Reality Ummo 3D Models Blender Bullet physics CEL Crystal Space Monkey King Peragro Tempus video of Bullet Bullet physics Bullet is an open source software multi-threaded 3D Collision Detection, Soft Body and Rigid Body Dynamics Library ( physics engine ). It is published under the zlib license making it free