TurboSquid - TurboSquid offers 3D models for professionals.
ftrack - ftrack is an Academy award-winning cloud-based project management solution used in the media and entertainment industry.
STLFinder - The 3d models search engine.
Yamdu - Cloud-based film production management software for film, television and commercials.
3DOcean - 3D Models & Accessories From $1 for 3D Models, Textures, Materials & Shaders, 2D Concepts...
Phraseanet - Phraseanet is a Digital Asset Management system (DAM for short) targeting the professionals needs.