http://www.draftsperson.net/index.php?title=Draftsperson.net:Free_AutoCAD_Blocks
http://www.draftsperson.net/autocad/blocks/vehicles/cars/index.php
http://grabcad.com/
Google 3D Warehouse: http://sketchup.google.com/3dwarehouse/
Software:
Pure-Mac 3D & animation App Database: http://pure-mac.com/3d.html
TurboCAD & AutoCAD for Mac - see this post http://panabloga.blogspot.com/2011/11/cad-download-links.html
