3Delight Free - http://www.3delight.com/index.htm

Anim8or - http://www.anim8or.com/

Aqsis - http://www.aqsis.com/

Blender - http://www.blender3d.org/

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

POV-Ray - http://www.povray.org/

SOFTIMAGEXSI EXP - http://www.softimage.com/products/exp/v3/

Terragen - http://www.planetside.co.uk/terragen/

Toxic - http://www.toxicengine.org/

Wings 3D - http://www.wings3d.com/

Anti-Virus:

a-squared - http://www.emsisoft.com/en/software/free/

AntiVir - http://www.free-av.com/

Avast - http://www.avast.com/i_idt_1018.html

AVG - http://free.grisoft.com/

BitDefender - http://www.bitdefender.com

ClamWin - http://www.clamwin.com/