ioBroker - flexible and modular application for the IoT and Smarthome
Google Home - Set up, manage, and control your Chromecast, Chromecast Audio and Google Home devices.
Domoticz - Domoticz is a lightweight Home Automation System
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
IP-Symcon - IP-Symcon is the innovative centre of your entire building automation!
Nim Home Assistant (NimHA) - Nim Home Assistant is an open-source home automation platform running on Nim.