
Sculptris
Blender
ZBrush
meshmixer
Cinema 4D
Sketchfab
Misfit Model 3D
ShapeShop
HyperFun
OpenSCAD
FreeCAD
CadQuery
Antimony
OpenJSCAD.org
BRL-CAD
ImplicitCAD
SculptrisBlender - Blender is the open source, cross platform suite of tools for 3D creation.
OpenSCAD - OpenSCAD is a software for creating solid 3D CAD objects.
ZBrush - ZBrush is a digital sculpting and painting software solution.
FreeCAD - An open-source parametric 3D modeler
meshmixer - meshmixer is an experimental 3D modeling tool for making 3D mashups without too much hassle.
CadQuery - CadQuery is a parametric cad script framework