Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Traveling Spoon - Travel off the Eaten Path
ioBroker - flexible and modular application for the IoT and Smarthome
Sidecook - Airbnb for personal chefs
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
BotSoft - Facebook Messenger chatbot that presents restaurant's menu