Talking about Autodesk, that's really a company that wants to protect his own content! For years there major application Autocad ruled the engineerings market as the number one CAD-application. Autodesk refused to give its dwg-format free for other companies for protective reason, so an opensource SDK was developed by a non-profit organisation. Programs like Rhino3D and Turbocad thank there existence on that. For years it has been more or less tolerated by Autodesk, but suddenly they are sueing the open design alliance for adapting there SDK to the latest Autocad2007 dwg-format.

It's a little of target but compaired to that E-frontier and DAZ are big buddies.
If every company was so protective about their own content, we would have hundreds of different videotape, CD and  DVD-standards for example.

-How can you improve things when you don't make mistakes?