PURE, another responsive CSS library

\nPure is ridiculously tiny. The entire set of modules clocks in at 4.2KB* minified and gzipped, without forgoing responsive styles, design, or ease of use. Crafted with mobile devices in mind, it was important to us to keep our file sizes small, and every line of CSS was carefully considered. If you decide to only use a subset of these modules, you'll save even more bytes.\n

I admit now I probably fall back on Bootstrap too quickly now (this site as a prime example) so projects popping up like this are great too see. Plus one nice feature is the Skin generator so that your project doesn't look like everyone elses out of the box