Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Let’s Create! Pottery HD Lite - Infinite Dreams Inc.
FreeCAD - An open-source parametric 3D modeler
Sculptris - Sculptris: Enter a world of digital art without barriers.
Let’s Create! Pottery - Let’s Create! Pottery is a Casual Single-player Simulation developed by Infinite Dreams.
meshmixer - meshmixer is an experimental 3D modeling tool for making 3D mashups without too much hassle.