Blender is the open source software for 3D modeling, animation, rendering, post-production, interactive creation and playback. Available for all major operating systems under the GNU General 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 video sequence editing, character animation action editor, non-linear animation mixer, image/UV editing, file/image selection and file management
Built-in text editor for annotations and editing Python scripts
Consistent interface across all platforms
A range of 3D object types including polygon meshes, NURBS surfaces, bezier and B-spline curves, metaballs, vector fonts (TrueType, PostScript, OpenType)
'Smooth proxy' style catmull-clark subdivision surfaces with optimal iso-lines display and sharpness editing
Armature (skeleton) deformation with forward/inverse kinematics, auto skinning and interactive 3D paint for vertex weighting
Non-linear animation mixer with automated walkcycles along paths
Constraint system
Vertex key framing for morphing, with controlling sliders
Oversampling, motion blur, post-production effects, fields, non-square pixels
Environment maps, halos, lens flares, fog
Various surface shaders such as Lambert, Phong, Oren-nayar, Blinn, Toon
Edge rendering for toon shading
Procedural Textures
Graphical editor for defining interactive behavior without programming
Collision detection and dynamics simulation
Playback of games and interactive 3D content without compiling or preprocessing
Audio, using the SDL toolkit
Multi-layering of Scenes for overlay interfaces
Read / Write TGA, JPG, PNG, Iris, SGI Movie, IFF, AVI and Quicktime GIF, TIFF, PSD, MOV (Windows and Mac OS X)
And much much more

Download:

http://fs6.filehippo.com/7240/ecf4e02f694241c991c5720c4f3da0c0/blender-2.45-RC2-windows.exe