Thomas Register
- over 1 million CAD drawings of parts from American
manufacturers
OhYeahCAD!
- parts library, for purchase but also thousands for free (reviews)
3D ContentCentral - thousands of
3D viewable and downloadable parts for free for use in various CAD
programs, by SolidWorks (reviews)
3Dmodelsharing.com
- clearinghouse for CAD users who want to share, sell or find 3D models,
parts, components or libraries, by Cadalog.com
Trace Parts - available for
CATIA, SolidWorks, Inventor, Solid Edge, Mechanical Desktop,
thinkdesign, TopSolid, AutoCAD, Pro/Engineer, Unigraphics, more
EMT Software - parametric parts for AutoCAD and SolidWorks,
for purchase
PARTsolutions
- standard- and supplier-parts catalog system with
native integration for all leading CAD systems.
Over 20,000 part families and 500,000 part variants.
VirtualCAD - offers free
high-detail CAD models with free manufacturer part number interchanges;
downloading available for all major CAD systems; models "etched" with
vendor names and part numbers
Compu-T's Engineering + Design
- offers SE-Fasteners, a series of Solid Edge data files for your
favorite fasteners, and SE-Metals, to create a new Part in Solid Edge
based on stock materials
Simple Symbol System
- AutoCAD symbol libraries for sale, covering architecture,
mechanical, plumbing, etc.