WikkaWiki : WikkaWiki is a flexible, standards-compliant and lightweight wiki engine written in PHP, which uses MySQL to store pages.
Clearbricks : No, Clearbricks is not yet another framework. Clearbricks is not cool at all and does not even have a nice website. It won't make you smart neither ha...
Astro : Astro is an all-in-one web framework for building fast, content-focused websites.
amphp : Amp is a non-blocking concurrency framework for PHP providing primitives to manage concurrency such as an event loop, promises, and asynchronous itera...
Symfony is a set of reusable PHP components and a PHP framework for web projects.