OnionShare
Jellyfin
The volunteer-built media solution that puts you in control of your media. Stream to any device from your own server, with no strings attached.
Kodi - Open Source Home Theater Software
Kodi is a free media player that is designed to look great on your big screen TV but is just as at home on a small screen.
Emby - The open media solution
media server for personal streaming videos tv music photos in mobile app or browser for all devices android iOS windows phone appletv androidtv smarttv and dlna
Piwigo