As I lately did almost no CSS/HTML jobs, I've missed the Sass3 release that implemented the SCSS extension (Sassy CSS). That's a CSS extension without any syntax «distortion», meaning that any valid CSS document is a valid SCSS document too. In this article, I'll compare that release with some existing preprocessors, such as and . Please note that the Sass syntax has been updated recently.
WebKit-based browsers have an excellent built-in tool for webpage debugging, Web Inspector. Basically, it's an analog of Firebug, with its own strengths and weaknesses. I've been using Web Inspector more and more lately, though one drawback bothered me a lot: It doesn't show line numbers of the CSS rules.