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