A9Converter is a DXF/DWG file format converter program. It supports up to Autocad 2005.

A9Converter Features
Standalone converter. No AutoCAD installation is required.
Convert DWG to DXF.
Convert DXF to DWG.
Perform version conversion among DWG files.
Perform version conversion among DXF files.
Read AutoCAD R2.5, R2.6, R9, R10, R13, R14, 2000, 2002, 2004, 2005 & 2006.
Write AutoCAD R10, R13, R14, 2000, 2002, 2004, 2005 & 2006.
Support drag-and-drop batch processiong.