Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Apple ARKit - A framework to create Augmented Reality experiences for iOS
ioBroker - flexible and modular application for the IoT and Smarthome
SketchAR - Start drawing easily using augmented reality
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Snap Art - Snap's augmented reality platform