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.
AllCast - AllCast is a mobile application that allows you to send photos, videos and music on your phone to your TV.
Kodi - Kodi is an award winning free and open source media player that got its start on the Xbox console.
Videostream - The easiest way to stream video from your computer to Chromecast or AndroidTV.
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.
PlayTo Chromecast - For those smartphone users who are looking for a smart way to enjoying their videos and movies without any interruption at all.