Blender - Blender is the open source, cross platform suite of tools for 3D creation.
SelfCAD - SelfCAD is an online 3D modeling and slicing software.
ZBrush - ZBrush is a digital sculpting and painting software solution.
SketchUp - 3D for Everyone
Aartform Curvy 3D - Aartform Curvy 3D is an easy and fast sculpting program for Windows.
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.