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.
DWGSee - A lite and fast dwg viewer, let you view, print, markup, measure dwg files. Supports AutoCAD 2020 drawing format!
de·caff Viewer - The de·caff Viewer version 3.
A360 VIEWER - Free online CAD Viewer
Free DWG Viewer - Free Viewer for DWG, DXF, DWF View AutoCAD DWG/DWF/DXF files View & measure DWG, DXF, DWF
ShareCAD - ShareCAD is one of the powerful tools that offer you a chance to view your 3D model in various formats like DWG, CAD, and many others.