OpenTheatre - Search movies, series, anime, subtitles, torrents and archives from open directories
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.
Veso - Veso is an open source media server. An emby/jellyfin fork that will move to a js react framework and focus on remote/rclone mounted media rather than local storage.
Kodi - Kodi is an award winning free and open source media player that got its start on the Xbox console.
Google Home - Set up, manage, and control your Chromecast, Chromecast Audio and Google Home devices.
Serviio - Web on Big Screen. Serviio enables playback of online sources like RSS feeds, live streams or web site content so that you can listen to your favourite podcasts or watch latest TV programmes published online.