* CAD:
– LIBRECAD http://librecad.org/cms/home.html
– DRAFTSIGHT http://www.3ds.com/es/products/draftsight/free-cad-software/
– FREECAD
http://sourceforge.net/apps/mediawiki/freecad/index.php?title=Main_Page
– QCAD http://www.qcad.org/en/
– SWEETHOME3D http://www.sweethome3d.com/es/index.jsp
* ANIMACION:
– BLENDER http://www.blender.org/
– K-3D http://www.k-3d.org/
– PENCIL PLANNER http://sourceforge.net/projects/pencil-planner/