Songbird is another program based on Mozilla and is a cool music application as you can change the themes, called feathers, download music though it does say if you you like it buy it, please take the hint as it will help the artists make some money… if they ever do get money from their soundtracks, I personally do not know.
There is a whole list of add-ons that you can download and install. All of them are placed in categories. The categories are: Appearance, Play back and Management, Content and Discovery, Web browser, and Developer Tools.
I have only tried out the Appearance themes which I find are the nicest I have ever seen. The overall look and feel is something that comes out of Firefox as it does have the web browser functionality and I have been using the Ubuntu theme for Songbird, plus this theme is pretty awesome!
This is release 0.5 and is working pretty well at any rate.
Overall I can say for sure that this will be one of the most popular music players in the future. I do wish this player had iPod support and would be able to add on to the iPod from playlists, though if that did happen I would not use Rhythmbox anymore. The player looks a lot like iTunes which I used before hand before I went to Linux and all of my fun distributions I have tried.