The Open Source Zone

If you need to build complex SQL databases you will find DbDesigner quite a useful tool. It allows you to construct your DB in an intuitive and easy to use environment, where you have a visual representation of the tables and relations contained in your project. You can quickly see the fields in a table or how each table relates to the others. After you are finished, DbDesigner can export the schema of the database into an .sql script, or directly connect to a database backend and build it there. It can also import already existing databases from .sql scripts or db backends. Of course, it can save your project into its native format (XML) so all information is kept (for example you can't save the positions of the tables in the workspace into an .sql script).
Due to its plugin architecture, DbDesigner is easily extensible to work with many database servers. By default it comes with 2 plugins: one for PostgreSQL and the other for MySQL.

DBDesigner 4 is an Open Source Project available for Microsoft Windows© 2k/XP and Linux KDE/Gnome. It is release on the GPL.