CAD Mgmt Toolbox: Free Autodesk File Viewers

Here is a quick list of free viewers from Autodesk:

Autodesk DWG TrueView views and prints Autodesk DXF and DWG files
www.autodesk.com/dwgtrueview

Autodesk Inventor View views and prints Autodesk Inventor assemblies, parts, and drawings
www.autodesk.com/inventorview

Autodesk DWF Viewer views and prints Autodesk DWF files
www.autodesk.com/dwfviewer

And the free convertor:

Autodesk DWG TrueConvert converts between AutoCAD Release 14, 2000 (i.e. 2000, 2000i, and 2002) and 2004, (i.e. 2004, 2005, and 2006) DWG file formats.
www.autodesk.com/dwgtrueconvert