Videostream - The easiest way to stream video from your computer to Chromecast or AndroidTV.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
AirWire - AirWire is a highly advanced application that enables its users to connect to their smartphone or any tablet device to a network, select any file and start playing any multimedia file.
ioBroker - flexible and modular application for the IoT and Smarthome
AllCast - AllCast is a mobile application that allows you to send photos, videos and music on your phone to your TV.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation