A360 VIEWER - Free online CAD Viewer
DXF View - A lightning-fast drawing viewer enables you to view DXF and DWG™ files on Mac
STP Viewer - Free STP Viewer - free software that lets you view 3D STEP files (.stp, .step file format).
Free DWG Viewer - Free Viewer for DWG, DXF, DWF View AutoCAD DWG/DWF/DXF files View & measure DWG, DXF, DWF
Glovius - Extensible & customizable 3D viewer, for consumption of product design data.
Amethyst CADwizz Ultra - Amethyst CADwizz Ultra is an AutoCAD viewer software solution that allows you to view the files which are created by AutoCAD software and you can even view the files without the presence of AutoCAD.