Webware 100 winner: Pidgin
As in, stick a fork in the Pidgin forking controversy, because it's forking ridiculous. Also, iTunes Store gets same-day DVD releases and memristors make their debut.
Pidgin is a free, open source IM client.
Move over, Trillian and Pidgin. This stylish chat app combines multiple instant-messaging accounts with Web e-mail, Facebook, MySpace, and Twitter, and throws in file transfers and SMS, too.