I deride the BBC often, as a contributor to their wealth (by way of our TV license fee), I feel I have every right to. Every once in a while they do something good though, and today's one of those days for me.
I'm a big fan of their website, with all it's shiny widgets and iGoogle-like interface, it's my idea of how a user configurable UI should work. Anyway, it seems the JS they use is an in-house concoction, something I was aware of. What I didn't know, is they open-sourced it under an Apache 2.0 license.
A cursory glance suggests it's very jQuery like in make-up, a not altogether bad thing. What attracts me to it more though, is the involvement of the BBC, and their browser support standards. The library is compliant with those standards, and, as it's the BBC, it always will be. No bad thing with so many issues from on browser to the next to have some level of assurance that your library will behave well.
Anyway, more info can be found at the libraries dedicated website
I'll let you know how I got on if I get around to giving it a run. Please let me know how it goes, if you try it yourself.