Blender - Blender is the open source, cross platform suite of tools for 3D creation.
FreeCAD - An open-source parametric 3D modeler
Rhino 3D - To be an effective designer today, you need tools to quickly develop your designs and accurately communicate them to everyone in the product research.
Sculptris - Sculptris: Enter a world of digital art without barriers.
Catia - CATIA (Computer Aided Three-dimensional Interactive Application) (in English usually pronounced /k?
meshmixer - meshmixer is an experimental 3D modeling tool for making 3D mashups without too much hassle.