CSSTree CSSTree is a tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and match
Gonzales PE @dev Gonzales PE is a CSS parser which plays nicely with preprocessors. Currently those are supported: SCSS, Sass, LESS. Try out Gonzales
rework CSS manipulations built on css, allowing you to automate vendor prefixing, create your own properties, inline images, anything you can imagine!