Zend Framework - An open source, object-oriented web application framework implemented in PHP 5
LibreOffice - Base - Base, database, database frontend, LibreOffice, ODF, Open Standards, SQL, ODBC
Agile Toolkit - Agile Toolkit is a PHP framework for developing Web User Interfaces.
My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.
CodeIgniter - A Fully Baked PHP Framework
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.