Associated .DWG software

Windows
DWG file extension
AutoCAD Drawing Database
The .DWG file format is used by a number of CAD applications, such as AutoCAD and IntelliCAD, computer aided drafting (CAD) software packages for 2D and 3D design and drafting.
It currently runs only on Microsoft operating systems. Versions for Unix and Apple Macintosh were released, but these met with limited market acceptance and were later dropped. It usually suffers from poor performance when run in an emulator or compatibility layer like Virtual PC or WINE.