Chartio - Chartio is a powerful business intelligence tool that anyone can use.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Tableau - Tableau can help anyone see and understand their data. Connect to almost any database, drag and drop to create visualizations, and share with a click.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Sisense - The BI & Dashboard Software to handle multiple, large data sets.
ioBroker - flexible and modular application for the IoT and Smarthome