Supysonic

Extensible music server. Offers a superset of the mpd API, as well as integration with 3rd party services like Spotify, SoundCloud etc.

Music library manager and MusicBrainz tagger (command-line and Web interface).

Audiobook and podcast server. It streams all audio formats, keeps and syncs progress across devices. Comes with apps for Android and iOS.

Server software which controls a wide range of Squeezebox/Slim Devices audio players and compatible hardware (formerly Logitech Media Server).

Synchronous multiroom audio server.

Access your own music using a web interface.