DWF to DWG does NOT require AutoCAD to run,batch convert many DWFs into DWGs.
Batch convert DWG to PDF, DXF to PDF and DWF to PDF without need of AutoCAD.
FlashDWG is a DWG to Flash, AutoCAD to Flash, DWG to SWF converter.
DWGViewX is a dwg viewer ActiveX control. Supports DWG/DXF AutoCAD 2.5 thru 2012