Autodesk DWG TrueView - Get a free DWG viewer to view, open, edit, and convert .dwg files, the native file format for AutoCAD files. DWG Trueview includes DWG TrueConvert.
AutoDWG DWG DXF Converter - A batch bi-directional DWG and DXF converter and dwg version converter without need of AutoCAD!
Autodesk Design Review - Design Review lets you view, mark up, print, and track changes to 2D and 3D files.
Free DWG Viewer - Free Viewer for DWG, DXF, DWF View AutoCAD DWG/DWF/DXF files View & measure DWG, DXF, DWF
ZWCAD Viewer - Cross-Platform .DWG | .DXF | .DWT R12-2013 Viewer
Creo View Express - Creo View Express is a simple CAD tool to review a 3D design for a quick evaluation.