Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.

Cloudbeds - Cloudbeds is the platform that powers hospitality, enabling tens of thousands of lodging businesses in more than 150 countries worldwide to grow and thrive.

ioBroker - flexible and modular application for the IoT and Smarthome

Viator - Tours, things to do, sightseeing tours, day trips and more from Viator.

openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation

VirtualConcierge - A concierge service that serves as a tool for businesses wishing to provide a progressive employee benefit that improves the productivity, recruiting power, morale and motivation of the work force.