Last.fm
Used by 11 peoplelast.fm ↗
“Spotify, iTunes and all my music players are piped into last.fm so that I can track changes in my musical taste.”
Adewale Oshineye Interview, Developer advocate (Google+) · via Uses This 
“In 2002 I founded Audioscrobbler, which ultimately became Last.fm, and was CTO at Last.fm until 2009.”
Richard Jones Interview, Developer (Last.fm, IRCCloud) · via Uses This
