AutoCADder

An often overlooked component of every AutoCAD box is Autodesk Product Manager (APM). This utility can discover and list virtually all Autodesk applications installed on your network. APM reports application names and versions, serial numbers, registration information and other important properties. Autodesk has released an update for this utility which extends the number of known applications - APM now recognizes also the AutoCAD 2006 family products, Revit 8 and Inventor 10.
You can find Autodesk Product Manager under
Start > Programs > Autodesk > CAD Manager Tools

I never thought that RText object can be formatted. CAD Forum publishes an interesting tip - How to underline text in a RText entity?. Probably can be used also for other things.

Autodesk has currently a rather complicated set of viewers for its CAD formats - i.e. for CAD data created in AutoCAD, Inventor, Revit, etc.
The Autodesk recommended solution for viewing AutoCAD data is the DWF format. Autodesk says "don't distribute/view DWG files, use DWF publishing instead". It makes sense in the most scenarios but some users still need to view the native DWG files. So if you cannot use the DWF files (which can be viewed easily in the DWF Viewer), you have to pick either the commercial Autodesk Volo View or Autodesk DWF Composer (with its DWG Viewer), or a third party DWG viewer (from IGC, Bentley, Cimmetry, Dr.DWG...).
For Inventor the situation is a lot easier as a free Inventor View is distributed with every Inventor license, plus Inventor formats (IDW, IPT, IAM) can be viewed also with the DWF Composer.
Revit users have to use the demo mode of the Revit application (downloadable from Autodesk web site) to view Revit data (RVT, RFA).