Blender

Blender, the open source software for 3D modeling, animation, rendering, post-production, interactive creation and playback. Available for Windows, Linux, Irix, Sun Solaris, or Mac OS X under the GNU Public License. Revolutionary non-overlapping and non-blocking UI delivers unsurpassed workflow. Flexible and fully configurable window layout with as many screen setups as you prefer . Powerful built-in database system allowing instances, scene management, and dynamic linking multiple project files. Anti-aliased fonts with international translation support. Windows for animation curves/keys, outliner, schematic scene diagram, non-linear video sequence editing, character animation action editor, non-linear animation mixer, image/UV editing, file/image selection and file management.
Blender is being released with source codes under the GNU Public License. Blender therefore is fully free to use and distribute within any educational, professional or commercial environment. Artwork created with Blender - including python scripts - is the sole property of the creator.

Game Engine

GLSL shaders, the ability to use Blender materials within the Game Engine, multiple UV sets, multiple viewports, the return of the armatures, double sided lighting, alpha test sorting, restoration of sound, along with work on the bullet rigidbody dynamics and collision system, and numerous game engine fixes, makes this a great release for Game Engine aficionados. GLSL Pixel and Vertex shaders You can now program pixel and vertex shaders to be used in the game engine, allowing much more sophisticated and attractive effects.