http://lescss.org/ The crux of this js library is to preprocess your CSS files so you can use a few carefully-chosen extensions to make your CSS files smaller and more powerful (kind of like web2py).
For example, VARIABLES. How many times have you wished you could just assign a name to a color and then use it over and over and over inside your CSS file? Another example, NESTING. You can actually use a class, id, or element definition within another and its definition nests. And you can even pass parameters to tailor the nested CSS. For something as simple in concept, it's a little overwhelming at how it can transform a complicated CSS file. I'm still wrapping my head around it. -- Joe B.
