Featherlight is a very lightweight jQuery lightbox plugin. It's simple yet flexible and easy to use. Featherlight has minimal css and uses no inline styles, everything is name-spaced, it's completely customizable via config object and offers image, ajax and iframe support out of the box. Featherlights small footprint weights about 4kB – in total.
Updated the CDN urls to use Cloudflare's CDN (//cdnjs.cloudflare.com), seeing as cdn.rawgit.com has been shut down (see rawgit.com).
Other CDNs are available - but //cdnjs.cloudflare.com already had the files, so it made sense to use that.
Also a couple of formatting edits 🙂