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.
ApPHP AdminPanel - ApPHP AdminPanel Website Back End Script
CushyCMS - CushyCMS is a FREE hosted content management system that's actually easy to use, fast to setup and doesn't require programming skills.
MT Backend - MT backend is a PHP control panel solution for websites.
AdminLTE - Web-based admin dashboard & control panel template. Highly customizable and easy to use.
P4A - Php For Applications - PHP5 RAD Framework based on Zend Framework.