Stylus Stylus is a revolutionary new language, providing an efficient, dynamic, and expressive way to generate CSS. Supporting both an indented syntax and regular CSS style. Free Open Source Mac Windows Linux Web Node.JS No features added Add a feature 17 Like
Sass Sass is an extension of CSS3, adding nested rules, variables, mixins, selector inheritance, and more. . Free Open Source Mac Windows Linux Ruby No features added Add a feature 23 Like
LESS LESS extends CSS with dynamic behavior such as variables, mixins, operations and functions. LESS runs on both the client-side (IE 6+, Webkit, Firefox) and server-side... Free Open Source Web No features added Add a feature 24 Like