Free online conversion of 3d models
Babel3D are offering a free online 3D file translation service. Translate Google SketchUp, STEP, IGES, Rhino and Autodesk files
convert SKP, 3DM, STEP, IGES, OBJ, DXF, DWG to 3DS, OBJ, XAML 3D, and 2D PDF file formats.