Zillow - Is that home for sale? What is it worth? Where can I find foreclosures? Stop wondering!
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Trulia - Trulia’s top-rated real estate app helps you find the perfect home, wherever you are.
ioBroker - flexible and modular application for the IoT and Smarthome
LoopNet - LoopNet is an online commercial real estate marketplace that connects buyers, tenants, and investors.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation