Stretto

N

Navidrome Music Server

navidrome.org

Modern Music Server and Streamer, compatible with Subsonic/Airsonic.

K

koel

koel.dev

Personal music streaming server that works.

B

Beets

beets.io

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

A

Audiobookshelf

audiobookshelf.org

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

M

Mopidy

docs.mopidy.com

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

S

Snapcast

github.com

Synchronous multiroom audio server.