If you are into designing databases, you can use the following open source database design software. I had a problem wherein it became quite difficult to manage a database with lots of tables and relationships, and these kind of software made database design much simpler.
easyDesigner http://sourceforge.net/projects/easydesigner/ project Mogwai http://mogwai.sourceforge.net/index.html http://mogwai.sourceforge.net/erdesignerng.html DBDesigner4 http://www.fabforce.net/dbdesigner4/ Database Deployment Manager http://sourceforge.net/projects/dbm-project
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