Proof.ink - Proven immutable data stored on the Steem blockchain
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Immutable.js - Immutable persistent data collections for Javascript which increase efficiency and simplicity. - immutable-js/immutable-js
ioBroker - flexible and modular application for the IoT and Smarthome
DataTip - The fastest way to store & access your critical datapoints.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation