Ask HN: What's your favorite web application UI?

since alex mentioned almost.at, i'm going to go with qooxdoo - which (codewise) is a whole lot more direct.

http://qooxdoo.org/about

Still waiting on Atlas to appear though.

http://almost.at/ is very slick

I tried to do a similarly pretty UI with my Ajax app - http://gambolio.com/#/library/

Bittorrent and Google Search. Audiogalaxy was pretty cool too.

I'm a fan of the UIs-that-don't-actually-exist paradigm, if you couldn't tell.

my fav is hypem.com, they offer a good UI with some nice effects.

gmail