1)   progeCAD Smart! free DWG CAD 9.0.28.8
progeCAD Smart! is free for personal use. DWG DXF PDF read write. Similar icons, commands and interface as AutoCAD. Express tools, raster image embedding, IntelliCAD AutoLISP interpreter

 2)   Free DWG Viewer 5.3.0.2
Free DWG Viewer will open and view AutoCAD DWG, DXF, DWF and secure CSF formats. Drawing files can be viewed easily with full zoom / pan / eyeglass / layering controls. The viewer can save views to JPEG, and it supports accurate snap to point

 3)   Amethyst CADwizz MAX V3
Amethyst CADwizz MAX enables you to quickly and easily view and print AutoCAD DWG and DXF files. You can view and convert files to a variety of file formats, add redline annotations to drawings, and create hand-drawn effects.

 4)   progeCAD Standard Commercial IntelliCAD 9.0.18.11
progeCAD offers robust AutoCAD compatibility at minimal cost. Edit view print and convert Autodesk AutoCAD DWG files from most any version of AutoCAD. Similar icons, commands and interface. Raster image embedding, IntelliCAD AutoLISP interpreter.

 5)   Advanced DWG Print 2.13.65
Advanced DWG Print is an advanced printing solution for AutoCAD® based drawings (in DWG and DXF formats). Advanced DWG Print is usually used to automate large print jobs, where you would need to add different information to every drawing.

 6)   Amethyst CADwizz LE V3
Amethyst CADwizz LE enables you to quickly and easily view and print AutoCAD DWG and DXF files.