Open Source DB Design tool that Competes with Erwin, etc.
This is a promising tool. Open Source (under GPL) and works with the majore DB vendors although "optimized" for MySQL.
http://www.fabforce.net/dbdesigner4/index.php
General Information - What is DBDesigner 4?
DBDesigner 4 is a visual database design system that integrates database design, modeling, creation and maintenance into a single, seamless environment.
It combines professional features and a clear and simple user interface to offer the most efficient way to handle your databases.
DBDesigner 4 compares to products like Oracle's Designer©, IBM's Rational Rose©, Computer Associates's ERwin© and theKompany's DataArchitect© but is an Open Source Project available for Microsoft Windows© 2k/XP and Linux KDE/Gnome. It is release on the GPL.