Blender
Blender is a free software 3D graphics program, available for many operative systems, for example GNU/Linux, Mac OS X and Microsoft Windows. Among the features there are UV editing, animation tools, game engine with a physics simulator, video editor and many modeling tools. It has a fast development, and recent versions of Blender added sculpting and GLSL shading, improvements to the water simulation and big improvements to hair and fur rendering.
History
Blender was initially...