GNU GPLv2 with exceptions; Android client closed source
Songbird is a discontinued music player originally released in early 2006 with the stated mission "to incubate Songbird, the first Web player, to catalyze and champion a diverse, open Media Web".
Songbird utilizes the cross-platform frameworks Mozilla XULRunner and GStreamer media framework. Songbird currently runs on Windows and OS X. In 2012, an Android version and an iOS version were released. Songbird at one point also supported Solaris and Linux, but this support was dropped. As a result, users have forked Songbird and created a Windows, Mac, and Linux compatible derivative under the name Nightingale.
Songbird announced on 14 June 2013 that it would stop all operations and shut down by 28 June. The company was unable to fund further business operations and as a result all operations and associated services have been discontinued.
Users can add features and change functionality in Songbird by installing extensions. Extensions are similar to the Extensions for the Firefox browser and can be easily ported. Community coded extensions are available on Songbird's addons support page. Known community designed extensions are: Qloud Tagging & Search, eMusic Integration, iTunes Importer, Artist Tracker, Library File Organizer, Audioscrobbler Notifier, Wikipedia Artist Display, SHOUTcast Radio Directory, UnPlug, Adblock Plus, Taglib metadata handler, ChatZilla, and FoxyProxy.
Skins are referred to as "feathers" in Songbird, and give users and artists the ability to change the look of Songbird via an extension which generates a default skin. Using CSS (and optionally XUL), and an image manipulation program such as Photoshop or GIMP, users are then able to make Songbird look however they want.
In January 2010, Philips announced they will ship a personalized version of Songbird with some of their line of portable audio/video players.
On April 2, 2010, it was announced that official Linux support would end with Songbird version 1.7.2. POTI Inc. would instead focus on its Windows and Mac OS X versions of Songbird, providing only unofficial support for Linux releases.
Sometime during late 2012 or early 2013, Songbird's public SVN was taken down, along with their wiki and other source code related utilities. A survey later sent out via Twitter by Songbird suggests that POTI is closing the desktop player source code, planning to later sell an updated version, fixing many outstanding bugs and feature requests by users who have been ignored for years.