CADClick A database for mechanical engineers that offers access to CAD geometries from different suppliers on mechanical engineering. http://www.cadclick.de/

Web2CAD An independent portal for the mechanical engineering industry, offering parts catalogs in standard formats, and software for using and creating such catalogs. http://www.web2cad.com/

Human Figure Data Human-figure data sets for architectural drawings in DXF, MCD VectorWorks, and EPS format. Free download after registration, or purchase of CD-ROM [requires Flash]. http://www.sum-cd.com/

kit3Dmodels Collection of 3D furniture models in Max3.0 and DXF format, with some free sample downloads. http://www.kit3dmodels.com/

Parts Works Online 2D/3D parts library for Solidworks, AutoCAD and other software, in formats including ACIS SAT, DXF, DWG, and IGES. http://www.partsworks.com/

Vanguard Software GmbH Offers partsCAT, an electronic spare parts catalogue software for publishing catalogues on CD-ROM and online. http://www.vanguard.at/en/

PARTsolutions A parts library integrated with many CAD systems for direct invocation, as well as with standard data formats. http://www.partsolutions.de/index.asp?sid=2

ModelCAD A library of 2D and 3D architectural symbols in DWG and 3DS format on CD-ROM [requires Flash]. http://www.modelcad3d.com/

CADlib A searchable online database of 2D and 3D AutoCAD and 3D Studio models, and portal to manufacturers web sites. http://www.cadlib.co.uk/

Trace Parts Library of parametric components for 2D/3D CAD assemblies, which can be used with several CAD packages. http://www.traceparts.com/

Building Environments Furniture and accessories in DXF/DWG/3DS/MAX format for use in 3D visualisations for free download for architects and interior designers. http://www.buildingenvironments.com/

CADParts Produces library symbols and footprints for the Cadence CAD software. http://www.cadpartsusa.com/

3DSymbolSet Sets of pre-drawn blocks and symbols for interior design in DWG and DXF format, which can be modified after insertion. http://www.3dsymbolset.com/

CatDas Inc. Online 2D/3D parts library hosting, integrated with PTC Wildfire and the ability to do Parametric searches. Formats include PRT, DXF, IGES, DWG. http://www.catdas.com/

ETank, Inc. Software for calculating steel and aluminium storage tanks according to US standards, and management tools for plant equipment maintenance. http://www.etank.com/