ListenBrainz is a music scrobbling site, much like Last.fm, but open-source and tightly integrated with its sister project MusicBrainz. I hacked together my own little tool to submit using the now playing log file feature, but native support would be great to see, and probably more reliable.
Its API is pretty simple, at the very least you just send a 'single' event with as much metadata as you can muster (or even exact MBIDs if the
file tags have them) after listening to a track. Support for the 'playing_now' event and the ability to love/hate tracks would be also good to see.
