Software Developed by Bentley Systems
Bentley View V8i v.08.11.09.30
Bentley View is a free DGN viewer, DWG viewer, and i-model viewer.
Bentley GISConnect v.2.01.011.02
GISConnect adds several menus and toolbars to your AutoCAD application, so you can use native AutoCAD commands to create, edit and visualize GIS features in their native format.