Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Etch Clock - Modern clock that looks like it's etched from clay
ioBroker - flexible and modular application for the IoT and Smarthome
Linkcard - Create stunning digital business cards
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Knowee - Don't print your cards - Impress your contacts.