Archiforge
- http://www.archiforge.com/
- Free 2d, 3d cad models, textures, a gallery with projects as well as information about the latest architectural competitions.
CADClick
- http://www.cadclick.de/
- A database for mechanical engineers that offers access to CAD geometries from different suppliers on mechanical engineering.
CADRegister
- http://www.cadregister.com/
- A source for design professionals, engineers, and architects to download component drawings from leading manufacturers, in a variety of industry-standard formats.
CADSymbols
- http://www.cadsymbols.com/
- Online 2D/3D parts library for Solidworks, AutoCAD and other software, in formats including ACIS SAT, DXF, DWG, and IGES.
Oh Yeah CAD
- http://www.ohyeahcad.com/
- A free online parts library that supports AutoCAD, Solidworks, TurboCAD, and SolidEdge native file format.
PARTserver
- http://www.partserver.com/
- A parts library integrated with many CAD systems for direct invocation, as well as with standard data formats
VirtualCAD
- http://www.virtualcad.com/
- Free 3D CAD models in tandem with Free manufacturer part number interchanges. Supports all major CAD systems.