3D Graphics:
3Delight Free - http://www.3delight.com/index.htm
Anim8or - http://www.anim8or.com/
Aqsis - http://www.aqsis.com/
Blender - http://www.blender3d.org/
gmax - http://www.discreet.com/products/gmax/
Houdini (Free Edition) - http://www.sidefx.com/apprentice/index.html
Maya Personal Learning Ed. - http://www.alias.com/eng/products-services..._maya_ple.shtml
Now3D - http://digilander.libero.it/giulios/Eng/homepage.htm
OpenFX - http://www.openfx.org
SOFTIMAGE