Coelux - Artificial skylight that you won't believe isn't real
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Suzy Snooze - All-in-one smart nightlight, sleep soother and baby monitor
ioBroker - flexible and modular application for the IoT and Smarthome
Twist - Check fewer notifications, do more meaningful work. Twist is the team communication app for calmer, more organized, and more productive teamwork.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation