I love Ampache. While the web interface is not that great, it really shines with its multitude of backends: Subsonic, Plex, DAAP, UPnP/DLNA, and also WebDAV acc

I love Ampache. While the web interface is not that great, it really shines with its multitude of backends: Subsonic, Plex, DAAP, UPnP/DLNA, and also WebDAV access. I'm mostly accessing Ampache via the Subsonic and UPnP backends, and it works really great. There are excellent mobile clients which work pretty much out of the box with it (DSub, BubbleUPnP).