http://www.reib.ee/mkm/?mida=doc
http://sketchup.google.com/3dwarehouse/
http://shape.cs.princeton.edu/search.html
http://www.cadsymbols.com
http://www.freecadapps.com/shareware.php
www.cadalyst.com
http://cadinfo.net/
www.cad-portal.com/
www.tenlinks.com/CAD/
www.cadmonkey.com/
www.nvsi.com
3D model search engine
http://docs.bentley.com/index.php-
GIS-online dictionary