Kodi - Kodi is an award winning free and open source media player that got its start on the Xbox console.
Ant Media Server - Scalable, Ultra Low Latency & Adaptive WebRTC Streaming Ant Media Server provides Scalable Ultra-low latency (0.5 seconds) Adaptive Live Streaming with WebRTC. It supports RTMP, RTSP, Zixi, WebRTC, Adaptive Bitrate, HLS and MP4 recording.
Stremio - Watch videos, movies, TV series and TV channels instantly.
Nimble Streamer - Light-weight media server that is freemium, pay for control panel if you need it.
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.
Red5 - Red5 is an open source Flash media server for live streaming solutions of all kinds.