Automatic Java Class Diagram Generation Using ObjectAid

I was looking for a tool that would allow me to view my classes graphically, until I bumped into this question from stackoverflow.com:

http://stackoverflow.com/questions/1120032/what-is-your-favorite-automatic-class-diagram-generator-for-eclipse

And after trying several tools, I think ObjectAid beats'em all.

Object Aid Website:
http://www.objectaid.com/