PfP Studio: RAD for PHP-based web apps

freshmeat.net: Project details for PfP Studio
PfP Studio is a visual programming system for rapid application development of DHTML-based applications using PHP and Javascript. The front-end runs in a Web browser. It is intended to complement the skills of the developer rather than to mask out the base languages. Its objective is to implement reusable widgets in an easy-to-use front end.