Tool for creating Class diagrams from database

I am looking for a tool which can reverse engineer from database to create class diagrams?
{product name} is good but its not a free tool. Can anyone help me in suggesting a tool?

Thanks in Advance.

I think you can use rational rose

..

Thank's

Have you tried DBDesigner4?
http://www.fabforce.net/dbdesigner4/

Actually, it's not reverse to class diagram but sort of database diagram.