Here is a tip of a great resource for AutoCAD users.
“Based on your feedback, the site has been redesigned to provide a better user experience. The new design allows you to more easily find, view, and experience content to make you more productive. We welcome your feedback on this redesign and ideas for further site improvements.” - http://autocad.autodesk.com
I think the new design is a big improvement. I did not like the previous all in black layout you can find a screenshot of on the Kung Fu Drafter blog.