AutoCAD LT - AutoCAD LT is a drafting tool to create 2D drawings.
Autodesk DWG TrueView - Get a free DWG viewer to view, open, edit, and convert .dwg files, the native file format for AutoCAD files. DWG Trueview includes DWG TrueConvert.
BricsCAD - A powerful CAD platform, with features familiar to you from native .dwg applications.
DWG FastView - DWG FastView for Windows is a lightweight dwg/dxf drawing viewer and editor produced by Gstarsoft, no need of dwg format conversion, vector graph magnified without distortion and full compatible with AutoCAD DWG/DXF.
ActCAD - ActCAD is one Software for many applications covering the primary domains of – Architecture, Engineering, Construction (AEC) including Structural, Electrical, and Mechanical.
Autodesk Design Review - Design Review lets you view, mark up, print, and track changes to 2D and 3D files.