Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Playlist Machinery - Tools that help you create & organize your Spotify playlists
ioBroker - flexible and modular application for the IoT and Smarthome
Heartbeat - Listen to music with your friends together, on Spotify
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Magic Playlist - Get the playlist of your dreams based on a song