ProLease - ProLease helps organizations manage their leased, owned and subleased properties in one integrated system.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Yardi Voyager - Voyager is software for managing properties and the people who live there. The software is developed by Yardi, a company founded in 1984 that specializes in property management software. Read more about Yardi Voyager.
ioBroker - flexible and modular application for the IoT and Smarthome
DotLoop - Peoplework, Not paperwork.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation