DevConv can convert files among DXF-DWG-DXB formats, taking care of
     the preferred version.
     Managed version from R9 to R2007
     This is a stand-alone utility, AutoCAD is NOT required
    
     Easy to use interface, but also command line available to run it in
     silent mode.
    
     It's FREEWARE!

Related keywords:
   dwg
   dxf
   autocad
   command
   convert
   line
   run
   utility
   version
   interface