MySQL - The world's most popular open source database
PHPmaker - PHPMaker is a powerful automation tool that can generate a full set of PHP quickly from MySQL, PostgreSQL, Oracle, Microsoft Access, Microsoft SQL Server and SQLite databases.
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
P4A - Php For Applications - PHP5 RAD Framework based on Zend Framework.
SQLite - SQLite Home Page
MT Backend - MT backend is a PHP control panel solution for websites.