KaiOS - KaiOS is a light operating system for smart feature phones like the JioPhone and Nokia 8110.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Blot - A no interface, super easy blogging platform
ioBroker - flexible and modular application for the IoT and Smarthome
Windows 10 Mobile - Windows 10 Mobile is a mobile operating system developed by Microsoft.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation