Enter Audacious, a fork of the similarly-fated Beep Media Player. It works with Winamp Classic skins, satisfying my inner Microsoft fanboy. It can play back MP3 plus a slew of other formats. It s got a little bit of effects processing, some Last.FM support, and a whole lot of visualization plugins

Amarok is a really nice music player that connects to Wikipedia automatically, supports lyrics, uses AudioScrobbler and MusicBrainz, and connects to your iPod like nobody s business.