Blender - Blender is the open source, cross platform suite of tools for 3D creation.
3D Cityplanner - Urban and real estate development at your fingertips. With the 3D Cityplanner it’s possible to create, visualize, analyze and share 3d plans online.
Sculptris - Sculptris: Enter a world of digital art without barriers.
Silo - Silo is a focused 3D modeling application with the ability to effortlessly switch between organically sculpting high-poly models and precisely controlling hard-edged surfaces.
Sketchfab - Sketchfab is an industrial design software tool is useful for ideation and for beginners in the industrial design field.
MakeHuman - MakeHuman is a free, open source, interactive modeling tool for creating custom 3D human characters.