Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Facebook Portal - Smart, hands-free calling, with Alexa built in
ioBroker - flexible and modular application for the IoT and Smarthome
Sunrise - Sunrise is a service desk management software for organisations, supporting both internal & external customers.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Google Home Hub - Control your connected home in one view