TurnKey Symfony Appliance is a server appliance for Symfony, a PHP Web application framework that follows the MVC paradigm. It provides an architecture, components, and tools for developers to build complex Web applications faster by minimizing repetitive coding tasks. It is designed to be easy to use and easy to maintain. Security patches are automatically installed. It provides a Web management interface, configuration console, and an AJAX Web shell. To minimize footprint the appliance is built from the ground up with the minimum required components. It runs everywhere thanks to multiple build formats, including an installable live CD, a VMDK with OVF support, and an Amazon EC2 AMI.
astateful is a unique approach to Web development. It incorporates a solid theoretical foundation based on Dynamic Programming in which a Web site is programmed in such in a way that it can be "solved" using a 'top down' or 'bottom up' approach. It is very scalable. Caching and encryption are included by default. It has a steep learning curve.
PHP On Pie is a PHP framework that combines the best ideas from PHP projects like Drupal, CodeIgniter, Kohana, and ZendFramework. It has very few core concepts: classes, models, events, slots, and tools. It lets you repackage completed apps into plugins that you or others can use later. Its smart database classes allow you to implement vertical and horizontal partitioning (sharding) easily to handle millions of users.