CAD - Computer Aided Design

Offical AutoDesk Website Autodesk
is the maker of the popular Inventor and AutoCAD design software as
well as being the sponsor of the FIRST 3D animation competetion
FIRST CAD Library Provides models of the components used in current and prior FIRST robotic competitions as well as some other useful information.
CADTutor Delivers free help and tutorials for AutoCAD and associated software on the web.