iTunes Doodad lets you instantly switch playlists, skip tracks, or pause iTunes, all without using the iTunes interface, or bringing up a pokey Dashboard widget.
It installs itself as a tiny icon in the System Bar (up there next to your clock) and acts as a remote control for iTunes.
There are several preferences: choose which playlist types to display (Library, Smart Playlists, User Playlists, Podcasts, Purchased, Videos), and sort all of your playlists alphabetically (you'd think iTunes would let you do this, but it won't...), some other stuff, too.
