CGTrader - CGTrader is an online marketplace at which artists can sell and buy Revit and 3D models.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
3DExport - 3DExport is a 3D model marketplace where you can buy and sell 3D models, CG textures and digital objects for 3D printing with royalty free. Professional 3D models - 3DExport.com
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.
TurboSquid - TurboSquid offers 3D models for professionals.
Autodesk Maya - Maya is 3D computer animation software with powerful modeling, rendering, simulation, texturing, and animation tools for artists, modelers, and animators.