Through clever and constant application of propaganda, people can be made to see paradise as hell, and also the other way round, to consider the most wretched sort of life as paradise.
 
Adolf Hitler
 
If my soldiers were to begin to think, not one of them would remain in the army.
 
Frederick the Great

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