user interface not dissimilar to that of iTunes, written in XUL, and the Mozilla Gecko browser engine.
According to the welcome message when you first open the app . . .
Songbird is a media browser and Web player built from Firefox's browser engine.
Songbird is open source, will run on Windows, Mac OS X and Linux and
supports user contributed, cross-platform extensions.
This is a preview release, a proof-of-concept, so there are many things still
missing. We will have a full-featured version this summer. Sign-up for
updates at Songbirdnest.com. See the Release Notes for
what's working and our known bugs.
A couple of screengrabs . . .
More information and download here . . .