cakePHP
"CakePHP is a rapid development framework for PHP which uses commonly known design patterns like ActiveRecord, Association Data Mapping, Front
Controller and MVC." -- cakePHP.org
"CakePHP is an open source web application framework written in PHP, modeled after the concepts of Ruby on Rails, and distributed under the MIT License." -- wikipedia.org
All these buzz words mean that advanced custom systems can be produced faster and with less bugs than writing the system in raw PHP.
To the right you can see a selection of sites created with cakePHP
