Autodesk CAD programs should generally be able to work with the .dwf files and possibly export them or save them as common DWG or DXF. You can also find 3rd party conversion utilities like Any DWF to DWG Converter that supposedly allow and support dwf to dxf conversion. Might not work on all versions of .dwf files though.
Open DWF file Open DXF fileA free AutoCAD publishing solution
A 3D CAD translation software