Thangs3D - Thangs3D is an online community for engineers and visual designers that provides unlimited downloads of 3D models and CAD designs.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
STLFinder - The 3d models search engine.
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.
GrabCAD Library - The GrabCAD Library offers millions of free CAD designs, CAD files, and 3D models. Join the GrabCAD Community today to gain access and download!
ZBrush - ZBrush is a digital sculpting and painting software solution.