DWG to PDF Converter Pro is a batch converter that allows you to convert DWG to PDF, and DXF to PDF without the need of AutoCAD. The Pro version supports command line.
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PDF to AutoCAD Converter is a batch converter that allows you to batch convert your PDF files to usable and editable AutoCAD DWG or DXF files, so you can recover the entities in PDF to corresponding DWG entities easily.
Downloads: 32728 - Shareware - Download Now

DWG to DXF Converter is a batch DWG and DXF bi-directional converter that allows you to convert DWG to DXF, DXF to DWG without the need of AutoCAD.
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DWG to DWF Converter (DWG to DWF) allows you to convert DWG to DWF, DXF to DWF without the need of AutoCAD.
Downloads: 44875 - Shareware - Download Now

PDF to DXF Converter is a powerful windows program that will help you convert your PDF files to usable and editable DXF files quickly and easily, so you can recover the entities in PDF to corresponding DWG entities easily.
Downloads: 82996 - Shareware - Download Now