MySQL database server is the world´s most popular open source database. Over six million installations use MySQL to power high-volume Web sites and other critical business systems.

MAKEMSI v09.155 makes MSI based installation files and can automatically build new or update existing MSI files or other Windows Installer databases file types.

PostgreSQL is fast, easy to manage, secure and flexible, something many businesses and individuals use it for quite a while.

EMS SQL Manager Lite for SQL Server is a high performance tool for Microsoft SQL Server development and administration, it's a light and easy-to-use freeware graphical tool for MS SQL/MSDE administration.

Data modeler is a simple tool for drawing entity-relationship diagrams that you can print out or copy to another aplication like a word processing or a presentation tool. The SQL 92 schema generation allows the creation of the tables/columns/constraints designed into a compliant database.