Kodi - Kodi is an award winning free and open source media player that got its start on the Xbox console.
Ampache - Web ( HTTP centralized ) based audio/video streaming application
Stremio - Watch videos, movies, TV series and TV channels instantly.
YouTube Music - YouTube Music is a streaming app primarily designed for Android and iOS mobile devices. The app lets individuals search for music from their favorite artists, enjoy playlists, and access 30 million musical tracks.
Universal Media Server - Universal Media Server allows you to host your entire library of video, music, and pictures, and broadcast them conveniently to a wide variety of different devices.
Navidrome - Music Server and Streamer compatible with Subsonic/Airsonic.