I’ve recently been tinkering with the excellent Yahoo! UI Library. My first contribution to the community is ScrollTabView, an extension of TabView that uses a scrolling animation to switch between tabs. (Just check out the examples.)
My inspiration was Panic’s Coda site as well as a few others. Now it’s easy to create a similar effect on your site using YUI.
Check out my new YUI addons page to grab the code and view more examples!
Update: I’ve been featured on the official YUI Blog!
Update 2 (May 27): I’ve been featured on Ajaxian!