openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Robinhood - Free stock trading service.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Rally Rd. - Invest in blue-chip classic cars like stocks
ioBroker - flexible and modular application for the IoT and Smarthome
Freetrade - Invest in stocks & ETFs for free, get started in seconds.