Quick Tip: An Introduction to Sammy.js | Nettuts+

You’ve been seeing it for a while now with Google’s Reader, Gmail, and most recently, on Facebook. Probably, you, too, would like to write RESTful evented JavaScript applications. Well, fellow developers, meet Sammy.js, a tiny JavaScript framework built on top of jQuery. Sammy utilizes the URL hash (#) to allow you to create single page AJAX applications that respond to your browser’s back button
(Link: Quick Tip: An Introduction to Sammy.js | Nettuts+)