Online 3D Model Converter - free online 3D model converter, upload a model and export it into popular formats
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Skanect - The Easiest Way To 3D Scan With the Structure Sensor and Kinect-like 3D Sensors
ZBrush - ZBrush is a digital sculpting and painting software solution.
3D Object Converter - 3D Object Converter, a powerful 3d polygon model translation and interactive viewing shareware tool...
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.