STP Viewer - Free STP Viewer - free software that lets you view 3D STEP files (.stp, .step file format).
DXF View - A lightning-fast drawing viewer enables you to view DXF and DWG™ files on Mac
3D Viewer Online - 3D Viewer Online is a web service and works on computers, tablets and smartphones.
Free DWG Viewer - Free Viewer for DWG, DXF, DWF View AutoCAD DWG/DWF/DXF files View & measure DWG, DXF, DWF
JT2Go - The no-charge viewer for 3D JT data
Easy CAD Viewer - Easy CAD Viewer is a web-based and complete software that allows you to view the files which are created by AutoCAD and you can view the files quickly in the absence of AutoCAD.