There are many different open source licenses but they all must comply with the Open Source Definition - in brief: the software can be freely used, modified and shared. Programs released under this license can be used at no cost for both personal and commercial purposes. Open Source software is software with source code that anyone can inspect, modify or enhance. Freeware products can be used free of charge for both personal and professional (commercial use). Work with AutoCAD 2011 files-Get support for files created from the most current AutoCAD DWG file format.Freeware programs can be downloaded used free of charge and without any time limitations.

Integrate with Autodesk Design Review-View and plot DWG and DXF™ files, then publish as DWF files for quick, easy review and markup in Autodesk Design Review. Measure accurately-Take accurate distance and area measurements.

Convert drawings to other AutoCAD versions-Use the included DWG TrueConvert™ DWG version converter to convert drawings in newer versions of AutoCAD to older versions, and vice versa. Facilitate collaboration-Share AutoCAD drawings easily and accurately. By also installing the free* Autodesk® Design Review software, you can then open DWG files in Design Review to take advantage of powerful measure and markup capabilities, sheet set organization, and status tracking. Built on the same viewing engine as AutoCAD® software, DWG TrueView enables you to view the latest DWG and DXF™ files, just as you would in AutoCAD. Free DWG Viewer Autodesk® DWG TrueView™ software is a free* stand-alone DWG™ viewer with DWG TrueConvert™ software included.

Dwg trueview viewer