SquishIt

SquishIt is an asset optimization library for .net web applications. It handles combining and minifying css and javascript assets through creation of bundles. There are currently extensions available that allow use of .less, coffeescript, SASS/SCSS and Hogan templates through SquishIt's preprocessor pipeline. There is also an extension that writes your combined files to Amazon S3 that can serve as a template for integrating with the CDN of your choosing.