Songbird is an open-source customizable music player that's under active development.
We're working on creating a non-proprietary, cross platform, extensible tool that will help enable new ways to playback, manage, and discover music. There are lots of ways to contribute your time to the project. We'd love your help!
Version 1.0 of songbird has great support for shoutcast radio stations and the ipod under Linux, Windows and Mac. I would highly recommend songbird if you are using a iphone or Ipod 5th Gen and above, under Linux it just plugs and plays no more iTunes for me at long last. One of the top must have apps "iTunes" can be removed from my list and replaced with an Open Source option.