Raspberry Pi - The Raspberry Pi is a tiny and affordable computer that you can use to learn programming through fun, practical projects. Join the global Raspberry Pi community.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Microbit - BBC's handheld, programmable computer given free to UK kids
ioBroker - flexible and modular application for the IoT and Smarthome
OLinuXino - Open Source Software and Open Source Hardware, low cost Linux Industrial grade single board...
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation