Octopus by Joy - 1st icon-based watch that teaches kids good habits and time
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Kids in Touch - A safe, fun, messaging app for kids monitored by parents
ioBroker - flexible and modular application for the IoT and Smarthome
KidHab - Develop useful habits in your kid together
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation