SolidWorks
eDrawings 2012
FreeBuild, view, and share 3D models and 2D drawings.
WindowseDrawings
PaidExperience and share your SolidWorks designs on your Android phone and tablet.
Android
eDrawings Viewer 2015
FreeAutoCAD (dwg & dxf) & eDrawings viewer.
MacDWGgateway
FreeExchange DWG files between users of different AutoCAD versions.
Windows