Hello. I use a less known css processor: stylecow (I'm one of the creators). The most important points: It allows to write pure css (instead a pseudo-language such less or sass). It has development tools like watcher, browser live-reload, grunt/gulp plugins, etc. It's very fast, customizable with plugins and fix the code automatically (adding vendor prefixes, polyfills, etc) to work fine in all browsers. It allows to use variables, nested rules, placeholders, color manipulation, etc, but using the w3c standard syntax