I started on a Navidrome/Subsonic/Plex/Jellyfin replacement for my bachelors thesis this year - I haven't had the time to actively work on it since starting work but I really want to as I've been daily driving it for a while and it's lacking in quite a few areas.

Just as a warning, not even half of the stuff on the landing page are actually present in Coral but they absolutely will be future. The next thing on the plan is to re-write the UI in React Native so I can take Coral with me on the go.

https://coral.nectarine.sh (the download page is inactive, but you can grab a release from the GitHub page if you're so inclined)