ioBroker - flexible and modular application for the IoT and Smarthome
Girder - Made by Promixis, Girder is the award winning home and industrial automation software that allows...
IP-Symcon - IP-Symcon is the innovative centre of your entire building automation!
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Domoticz - Domoticz is a lightweight Home Automation System
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation