Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Tinitell - Wearable mobile phone for kids. GPS enabled.
ioBroker - flexible and modular application for the IoT and Smarthome
Toymail Talkies - Toys that connect people
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Spy Watch - Become a spy. A game for the Apple Watch.