Launch27 - Online booking & appointment scheduling.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Swept - Trusted Janitorial Software that Saves Commercial Cleaning Companies Time & Money. Smart, simple design: time tracking, scheduling, inspection, and more.
ioBroker - flexible and modular application for the IoT and Smarthome
CleanTelligent - CleanTelligent is business management software built from the ground up for use by janitorial service companies.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation