Plexamp - A small music player with a number of unique features
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Headset - Personal music player for Youtube and Reddit
ioBroker - flexible and modular application for the IoT and Smarthome
Poolsuite™ - The super-summer music player
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation