http://labs.autodesk.com/technologies/fusion
Autodesk Inventor Fusion 2012 Basics from AutoCAD 2012
Now shipping on the disk with AutoCAD 2012, Autodesk Inventor Fusion adds to the 3D conceptual design capabilities of AutoCAD and sets a new standard for professional 3D modeling ease of use. It also enables you to flexibly edit and validate models from almost any source, including CATIA, Pro/Engineer, Rhino, and Solidworks.
Source: Autodesk