Milligram : Milligram provides a minimal setup of styles for a fast and clean starting point. Just it! Only 2kb gzipped! It's not about a UI framework. Specially ...
Phalcon PHP : Phalcon is a web framework implemented as a C extension offering high performance and lower resource consumption.
amphp : Amp is a non-blocking concurrency framework for PHP providing primitives to manage concurrency such as an event loop, promises, and asynchronous itera...
xCSS bases on CSS and empowers a straightforward and object-oriented workflow when developing complex style cascades.