BENTLEY FREE VIEWER
http://www.bentley.com/en-US/Products/Bentley+View/
Format Support
RealDWG 2014
Supports point-cloud streaming
LandXML and Bentley civil terrain models
JT format
IFC
Rhino V5
Advanced Viewing Features
Dynamically explore models with Clip Volume to slice through models
Easily navigate using touch screen support in Windows 8
Analyze models by changing their visual display based on object attributes (i.e., height, slope, aspect angle)
View and navigate Bentley's groundbreaking hypermodels and their embedded plans, sections, and elevations
USING NEWFORMA
You can view DGN files with having to open them in Microstation by using the Newforma viewer.
To open in Newforma right mouse click over the DGN file, Open with > Newforma Viewer
If you want to be able to double click on a DGN to view it:
mouse click over the DGN file, Open with > Choose default program...
Then select Newforma Viewer, and make sure Always use the selected program to open this kind of file is ticked.
(this shouldn’t interfere with Microstation if you have it installed as you can’t open a file by double clicking on it anyway)
Note the viewer tasks on the left, including Measure, etc.