Trace Parts - Library of parametric components for 2D/3D CAD assemblies, which can be used with several CAD packages. CADParts - Produces library symbols and footprints for the Cadence CAD software. CADSymbols - Online 2D/3D parts library for Solidworks, AutoCAD and other software, in formats including ACIS SAT, DXF, DWG, and IGES. VirtualCAD - Free 3D CAD models in tandem with Free manufacturer part number interchanges. Supports all major CAD systems. Catalog Data Solutions Inc. - Online 2D/3D parts library hosting, integrated with PTC Wildfire and the ability to do Parametric searches. Formats include PRT, DXF, IGES, DWG. PARTcommunity - A parts library integrated with many CAD systems for direct invocation, as well as with standard data formats CADClick - A database for mechanical engineers that offers access to CAD geometries from different suppliers on mechanical engineering.