Symfony : Symfony is a set of reusable PHP components and a PHP framework for web projects.
chromeless : The chromeless project is an experiment into making it possible to build a web browser using only web technologies, like HTML, JavaScript, and CSS.
Mink : Mink is an open source acceptance test framework for web applications, written in PHP 5.3.
xCSS : xCSS bases on CSS and empowers a straightforward and object-oriented workflow when developing complex style cascades.
Humbug : Humbug is a Mutation Testing framework for PHP to measure the real effectiveness of your test suites and assist in their improvement. It eats Code Cov...
Phalcon is a web framework implemented as a C extension offering high performance and lower resource consumption.