In short words,
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.
opensource baby YEAH!! eehum *clears throat*
This is something you might find useful if you have stumbled with databases. If you haven't, dont't worry! in snap we'll spoil ya! This is the tool to make everything about databases slicker. But you are not here for chitchat, you are here to get yourself dirty with opensource applications, to know them all and get the best out of them. Well, you are in the right place. Nuff said, don't waste a second more and jump into this guide (its actually the documentation but is so well explained that works as a great primer for the application)
Have this tool in the radar because the team involved in its development has joined forces with mysql itself and soon will release Mysql workbench which is DB Designer successor. Get the facts..http://www.fabforce.net/mysql/wb_about.html