DWG TrueView™
Use this FREE* download to accurately view, plot, and publish
authentic DWG and DWF files. And now, DWG TrueView incorporates
all the functionality of DWG TrueConvert.
This means
you can translate any AutoCAD or AutoCAD-based drawing file for
compatibility with AutoCAD Release 14 through AutoCAD 2008.
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Autodesk Design Review
This software was created to view, markup and take dimension from 2d
and 3d DWF files.You can download this software for FREE from the following
Autodesk website.