Control a Music Player Daemon (MPD)Control your Music Player Daemon with just your browser!
http://www.musicpd.org/
I'm aware the UI is kind of bare bones (and perhaps even "terrible"). I'm not a UI type of guy, so people should send me pull requests to improve it :).
Note: The permissions for this extension asks for access to exchange data with any computer on the local network or internet. This doesn't actually access any system except for the one you specifically configure in the options page. Feel free to browse the source code below to verify. This is due to a limitation in Chrome itself: http://crbug.com/149693