In individuals insanity is rare, but in groups, parties, nations and epochs it is the rule.
 
Friedrich Nietzsche
 
Good comes only when people do it.
 
Erich Kastner

CAD - Computer Aided Design

Free CAD Software

http://www.freebyte.com/cad/cad.htm
List of CAD software available for free.

Sweet Home 3D

Sweet Home 3D is aimed at people who want to quickly design the interior of their home.
http://sweethome3d.com
Project page on Sourceforge
http://sweethome3d.sourceforge.net