Songbird is to music players as Firefox is to web browsers for a very simple reason: they’re built on the same code base. Because of that, it addresses one of my main complaints with iTunes, which was the web browser. The one in Songbird doesn’t suck. While Songbird isn’t quite ready to replace your iTunes installation just yet, it will be soon, because of one thing. Extensions. All the extensions you could dream of, and a bunch that you can’t. Go download the alpha and check it out.