TL:DR; DataNumen DWG Recovery is a powerful tool to repair and recover corrupt AutoCAD DWG files.
DataNumen DWG Recovery is a powerful tool to repair and recover corrupt AutoCAD DWG files. It can scan the DWG files, then recover your data in them as much as possible, so to minimize the loss in file corruption.
CADbro is a 3D CAD viewer that helps with your collaboration on engineering data. For users from sales & marketing, design-review, change management, production planning, manufacturing, technical documentation. Open Catia, NX, Creo step iges files.
VeryDOC PDF to CAD Converter can be used to batch convert PDF files to DWG or DXF files, it is a stand-alone program that needn't of AutoCAD and Adobe Acrobat products. It will convert your PDF files to usable and editable DWG or DXF files quickly.
PDF to DWG Converter Stand-Alone,a stand alone application allows you to convert PDF files to DWG or DXF files in one easy step. It supports AutoCAD version from R14 to the latest version 2011.