Jellyfin is the Free Software Media System that puts you in control of managing and streaming your media. There are no strings attached, no premium licenses or features, and no hidden agendas.
Navidrome is a self-hosted, open source music server and streamer. It gives you freedom to listen to your music collection from any browser or mobile device.
Audiobookshelf is a self-hosted audiobook server for managing and playing your audiobooks.
Calibre-Web is a web app providing a clean interface for browsing, reading and downloading eBooks using an existing Calibre database.