Plugins that are available in SVN or released version, see RhythmboxPlugins/WishList for requests and/or plugins in progress. See also RhythmboxPlugins/WritingGuide. For other plugins, see RhythmboxPlugins/ThirdParty.
C plugins
Audioscrobbler (now including last.fm streaming support as of 0.9.7)
iPod
Generic audio player
LIRC
Visualization Now available in SVN. Original enhancement request: http://bugs.gnome.org/76519
Python plugins
Artwork plugin Original enhancement request: http://bugs.gnome.org/307848
IM Status updates the status in IM clients (Gossip and Empathy) according to the current playing song. Since Rhythmbox 0.12.2.
Jamendo Support for Jamendo: http://www.jamendo.com/
Lyrics Original enhancement request: http://bugs.gnome.org/319320
Magnatune Support for the Magnatune store: http://www.magnatune.com/
Python Console Interactive Python console, provides control over Rhythmbox