Royalty Free
Fantastic Arts
This site contains many resources for a 3D artist including highly detailed models from organics to scifi meshes.

3D Cafe
Models, Textures, Tips, links to other locations, etc.

Avalon
Many different types of models.

3D Total
Misc models in 3DS and DXF formats.

3D Up
Large archive of misc models in various formats.

The Movie Mesh Site
Various models from some popular sci-fi movies.

JPL/NASA Spacecraft Models
Models of various spacecraft in DXF format.

3Dup Free Models
A terrific collection of free high-end 3D models. This collection speaks for itself.

Scifi-Meshes
A site for everyone and anything 3D science fiction related.

Renderology
Offers a variety of different models, textures, and tutorials. Also has a lot of useful information and links to other sites.

3D Plants
A site that has nothing but models of plants, shurbs, grasses, flowers, and many more in .obj, .3ds, .dxf formats.

GraFX Dome
A fantastic site that contains downloadable 3d models, along with texture maps. This site also contains a forum, and a gallery to submit some of your work.

3D Model Resources
Okino
Okino develops Polytrans and NuGraf, both 3D model translation applications. Converts almost any modeling format to another.

SCIFI 3D
Huge database of sci-fi models. High quality sci-fi meshes, most of them are in 3ds format.

Star Trek Mesh Collection
Everyone can download their favorite ships from here!

Turbo Squid
Has a great database of models, and texture maps for download. You can also sell your own models through this site.

The 3D Studio
The3dStudio.com is one of the oldest and largest 3D resource sites on the Internet, dating back to 1996.

Commercial
Geo-Metricks
High resolution models with lots of detail. Some character models. Some free models.

ModelBank by Digimation
Digimation is the world's largest provider of 3D content and develops products for customers in entertainment, advertising, visual simulation, computer-based training and corporate communications. Digimation's solutions are used to create digital effects for films, television programs, advertisements, games and multimedia titles. Digimation's Premier 3D model archive contains more than 30,000 individual models which are available in every major 3D file format. Digimation's Model Bank service is an online marketplace enabling users to list, promote and sell digital content. The company is also the publisher of 3D plug-in software for leading 3D applications.

Viewpoint
Very large collection of quality models. Can be pricey, but have almost anything you might need.

Zygote
Offers fully boned and IK'd human characters for CINEMA 4D.

David Rindner
David is a well known professional modeler and CINEMA 4D forum lurker. He can be hired to build custom models. You can see some his models in our free library.

Model Masters
Collections of office and transportation models. Currently a new collection in development called Alien Invasion. Some free models.

Plastic Thought
They sell VRML and Quickdraw3D models. Some free models.

USGS NSDI Clearinghouse DEMs
United State geological survey maps in DEM format.

Art Recon Inc.
Art Recon Inc. is a Canadian company dedicated to development and publishing of 3D object libraries related to art history.

Dosch Design
A company that has many different packages available to suit any of your 3D model needs.