When reviewing DWG files from AutoCAD, this software is a bit more advanced than other software such as Adobe. DWG Viewer allows basic tools to modify and annotate objects, similar to within AutoCAD, but it is great because you can open/view a DWG without having to PDF it first before sending it out for review.

DWG Viewer 2.0 is a great way to view and edit DWG files for users who do not have access to AutoCAD. AutoCAD is a very expensive and comprehensive program so DWG viewer is a great alternative for those who just need to view files.

This is a tool that does what it says - display any DWG or similar drawing file. It supports a ton of formats, and mostly doesn't have a lot of errors. 3D files still don't work properly, and neither does DWF format