Last.fm is a music community website that offers personalized internet radio, using a recommendation system called "Audioscrobbler" to build a detailed profile of users...
Libre.fm is a project to help you keep track of what music you like and share that, with your friends, discover new music, and meet new people who share your taste in music.
ListenBrainz is an open source music website that allows users to import their listen history.
Scrobble to last.fm, libre.fm, gnu.fm and listenbrainz, from most apps including video streaming apps, less known audio players or even a song playing in your IM app.
Herrie is a minimalistic music player that uses the command line. It is written to support a variety of operating systems, audio subsystems and file formats, including playlists.
shell-fm is a lightweight, console-based player for Last.FM radio streams.
Scroball is a lightweight scrobbler for Last.fm which can track music playback from almost any media player on Android.