AutoCAD 2012 for Win

AutodeskDWG TrueConvertAutodesk DWG TrueConvert translates any AutoCAD or AutoCAD-based drawing file to AutoCAD R14, AutoCAD 2000, AutoCAD 2004, and AutoCAD 2007 DWG file formats, as well as to AutoCAD LT 98, 2000, 2004, and 2007 DWG file formats. The DWG TrueConvert software allows conversion of pen widths to lineweights and the addition of page setups.

AutodeskFBX Converter
Win platformFBX Converter - Win platform is a utility from Autodesk runs on the Windows platform and lets you convert OBJ, DXF and 3DS files to the FBX file format or vice versa. This offers the flexibility to transfer project data from one application to another quickly and easily.