Free 3d programs:
OpenScad ( 3d model program which uses volume represantation )
Autodesc 123D Make
Sites with 3d models and design
Thingivers
Ponoko ( commercial), 2d tips
Inventables
Laserbits ( web focus on the laser cutter)
Open Source communities
Github ( tutorials for OpenScad )
Tutorials:
http://www.youtube.com/watch?v=OSJQlMdZisI
Published on
February 21st, 2013