AutoCAD LT - AutoCAD LT is a drafting tool to create 2D drawings.
Free DWG Viewer - Free Viewer for DWG, DXF, DWF View AutoCAD DWG/DWF/DXF files View & measure DWG, DXF, DWF
MicroSurvey Software - MicroSurvey CAD is a full-featured CAD package that lets you do everything from creating point clouds to designing complex survey networks.
DXF View - A lightning-fast drawing viewer enables you to view DXF and DWG™ files on Mac
progeCAD - progeCAD is DWG/DXF-native CAD software, built for professional drafting.
ODA Viewer - ODA Viewer is a web-based software solution that allows you to view the files based on ODA format and you can easily zoom the file for detail visualization.