Cults is a marketplace that connects designers and people who want to 3D print some objects.
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
CGTrader is an online marketplace at which artists can sell and buy Revit and 3D models.
Helping mechanical engineers build great products faster
Thingiverse.com is the place to share digital designs for fabricating real, physical objects.
The place to share and download SketchUp 3D models for architecture, design, construction, and fun.
Explore the world of 3D
Sketchfab is an industrial design software tool is useful for ideation and for beginners in the industrial design field.
Free 3D Models, TF3DM is the go to place where you can share your free 3d assets and download instantly any you like.