ProntoForms - ProntoForms is a mobile business solutions application, converting paper forms onto any tablet or mobile device.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
mHelpDesk - mHelpDesk is a mobile field service management software.
ioBroker - flexible and modular application for the IoT and Smarthome
Forms On Fire - Forms On Fire provides a complete, customizable mobile forms and workflow system that is reliable and secure, works offline or online.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation