Blender : 3D Animation and Modeling suite
Blender is well suited for character animation, effects, and content creation for games, movies, and flash or web animations, as well as for still renderings for such areas as illustration, architecture, and product design.
Blender provides a broad spectrum of modeling, texturing, lighting, animation and video post-processing functionality in one package. Through it's open architecture, Blender provides cross-platform interoperability, extensibility, an incredibly small footprint, and a tightly integrated workflow. Blender is one of the most popular Open Source 3D graphics application in the world.
Aimed world-wide at media professionals and artists, Blender can be used to create 3D visualizations, stills as well as broadcast and cinema quality videos, while the incorporation of a real-time 3D engine allows for the creation of 3D interactive content for stand-alone playback.
Originally developed by the company 'Not a Number' (NaN), Blender now is continued as 'Free Software', with the source code available under the GNU GPL license. It now continues development by the Blender Foundation in the Netherlands.