Navidrome is another server that works pretty well, implements the subsonic protocol ( so all the apps that can cache and stream to your mobile device work). You can have multiple logins, or just share out playlists and albums individually to non-authenticated users.
Subsonic is also a protocol (and opensubsonic) which supports many other clients, if you want. Personally my music collection is just hosted on gonic, a server-only subsonic implementation and I stream it to whatever clients I want.
I was just about to reply that I liked supporting the developer of the original code and that it wasn't too expensive (I bought a "lifetime premium" for something like $30 USD I think) . But it seems the licensing has gotten ridiculous since then and is now a subscription. :-(