Flow : Flow is a PHP web application framework focussed on Domain-Driven Design and clean code.
Silex : The PHP micro-framework based on Symfony2 Components
Kraken Framework : Kraken is the first and only multi-processed, multi-threaded, fault-tolerant framework for PHP. It has been written to provide easy and reliable API f...
Symfony : Symfony is a set of reusable PHP components and a PHP framework for web projects.
xCSS : xCSS bases on CSS and empowers a straightforward and object-oriented workflow when developing complex style cascades.
A powerful yet easy-to-use PHP micro-framework designed to help you build dynamic and robust Web applications - fast!