1)   DwgConverter 3.1
A batch converter tool that converts DWG/DXF R2.5 ~ R2006 files to BMP, JPG, TIFF, GIF, PNG, EMF and WMF images without the need of AutoCAD. It can also convert DWG/DXF files to vectory PDF file.And supports AutoCAD DWG/DXF File Version Conversion