General 3d Model Manipulation

Meshlab:

Very good free program for manipulation 3d meshes, going from 3d scanned point clouds to meshes, etc.

http://sourceforge.net/projects/meshlab/

Use in concert with 3d scanner, Rhino, MotionBuilder, Maya, etc.

http://groups.google.com/group/crca-labs

http://groups.google.com/group/crca-labs/web/motion-capture