3D CAD Browser A 3D CAD model exchange system where you can download 3D models and upload your models in exchange. More than 5,000 models available in major file formats such as .3DS, .DXF, .DWG, .OBJ, .LWO, .IGES. Requires annual paid registration.

3D Cafe Offers numerous three dimensional files for downloading either for purchase or as freeware. Several file formats available.

3D ContentCentral Free models of 3D parts and assemblies, 2D blocks, and macros for CAD users. A large library of user- and supplier-contributed models.

3dputty.co.uk 3dputty.co.uk offers detailed 3d models in .max, .3ds and .obj formats. categories include technology, architecture, household, vehicles and the site has an especially wide selection of furniture. New, detailed models added weekly. Can create custom models to client requirements and also offers several free samples.

Amazing3D.com Offers a many files without charge, and has numerous categories of files for sale. Has especially good coverage for aircraft models.

Anatomics Pty. Ltd. Offers sample medical and anatomic files.

Avalon Public three dimensional files archive.

Dr. Gill Barequet's Home Page Professor Barequet of the Faculty of Computer Science of The Technion (Israel) has a collection of human organ models and terrains in polygonal slice format.

Body Replicas A subsidiary of Javelin 3D, this site is dedicated to MRI/CT Data Reconstructions. From human skulls to complete spinal reconstructions. Online ordering and electronic downloads available.

Clemson University Follow the link to Clemson's FTP site.

Cyberware Human body files. Sample files are available in PLY format, but can be converted with a translator available on the site. [Older Netscape browsers have trouble with this site.]

DAZ 3D Numerous designers offering a wide range of three-dimensional models, or detailed features such as hair. The site is an especially good source for human models for gaming, but also has good sets of transportation and object models.

James Dean's Page Not the movie star, even better. Mr. Dean has written a program that outputs an STL file of a maze that has a solution that can be any string of characters. Would make a nice toy or a gift for that topologically-minded special someone.

DeEspona.com (Spain) A large selection of three-dimensional files in many categories, with a good number offered at no charge.

Find-3D.com A general 3D portal with listings for numerous free and paid file sources.

Flash Fire Designs Offers more than 250 models in a variety of formats in such categories as: animals, architecture & urban, characters & humans, food & kitchenware, furniture & household, gems & jewelry, geography, plants, space & electronics, sports, terrain, transportation & road signs, weapons & tools. A free sample model is also available.

Georgia Tech Follow the link to Georgia Tech's FTP site.

Javelin 3D Offers Body Replica^TM Collection on CD. It contains 25+ anatomical 3D reconstructions in STL file format, plus Quicktime^TM movies and 2D graphics. The 3D anatomical reconstructions were produced by tissue segmentation of 2D gray-scale image data from computed tomography scans, magnetic resonance image data and output from microscope studies. Also see the company's Body Replicas web-site, described above.

Mesh Factory Has transportation, animals, insects, technology, anatomy, architectural and household objects, weapons and more, but not free.

Model Masters Heavy emphasis on transportation, but other things, too. Several file formats and also has a few free items.

Raindrop Geomagic

rocky3d.com Offers a substantial number of models in a wide range of categories free. Also can supply special items for a fee.

The Stanford 3D Scanning Repository Intended to support researchers who do not have access to scanning facilities or dense polygonal models for the development of scanning devices and surface reconstruction algorithms. The archive is intended to make some data and detailed models available to the public.

TurboSquid A large selection of three-dimensional files in many categories, with a good number offered at no charge.

Ultimate 3D Links This is an extensive directory site which also covers all aspects of 3D applications tutorially. Also has a file archive.

Visible Productions The company provides an extensive library of antomical models based on the National Library of Medicine's Visible Human data sets.

X-TRUSION (Spain) Offers an array of 3D models in various formats. Emphasis is on human figures and groups of figures.