A360 VIEWER - Free online CAD Viewer
de·caff Viewer - The de·caff Viewer version 3.
Glovius - Extensible & customizable 3D viewer, for consumption of product design data.
Free DWG Viewer - Free Viewer for DWG, DXF, DWF View AutoCAD DWG/DWF/DXF files View & measure DWG, DXF, DWF
VariCAD Viewer - 3d cad,mechanical cad,mechanical engineering,linux cad
DXF View - A lightning-fast drawing viewer enables you to view DXF and DWG™ files on Mac