Picard is a cross-platform music tagger powered by the MusicBrainz database
Server for the MusicBrainz project (website, API, database tools)
Server for the ListenBrainz project, including the front-end (javascript/react) code that it serves and all of the data processing components that LB uses.
Official Android App of ListenBrainz
The server components for the AcousticBrainz project
Repository for Creative Commons licensed reviews
MusicBrainz Spotify integration hack for SF Music Hack Day 2014