GNU FM is a music community platform that is compatible with the Audioscrobbler API most commonly associated with . As of August 2014, the defacto GNU FM installation,  has been in production usage for over five years and has recorded over 98 million song listens.
Planned social networking functionality was abandoned and eventually the GNU social project was spun off to create this.
GNU FM is federated, and we even federate with Last.fm.
IndieWebCamp participants who are using GNU FM on their own site:
- Matt Lee (2014) :http://libre.fm (I run the site, so it's mine... I just have 167,551 other people sharing it with me)