ZWCAD Viewer - Cross-Platform .DWG | .DXF | .DWT R12-2013 Viewer
AutoCAD LT - AutoCAD LT is a drafting tool to create 2D drawings.
Autodesk Design Review - Design Review lets you view, mark up, print, and track changes to 2D and 3D files.
LiteCAD - Create, edit, view, and print 2D CAD drawings using the file formats: dxf, dwg, shp ;Download-Size...
Creo View Express - Creo View Express is a simple CAD tool to review a 3D design for a quick evaluation.
BricsCAD - A powerful CAD platform, with features familiar to you from native .dwg applications.