Amberjack: JavaScript Site Tour Creator:

Arash Yalpani has released Amberjack, a tiny and Open Source/GPLed JavaScript library you can use to create nice looking tours for a web site.

There is a tour wizard to make it simple to create your own tours, and a JSON technique is used to post-fetch skins.

Checkout a sample tour to see it in action.

This is pretty cool, would be a nice addition for complicated web applications, especially if they break user conventions or expectations. Also useful if you have a site that has hidden (to reduce visual clutter) interface options.

(Via Ajaxian Blog.)