Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Whyd - Beautiful, great-sounding, voice-controlled speaker
ioBroker - flexible and modular application for the IoT and Smarthome
Tmall Genie - Alibaba's Echo-like smart speaker competitor
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Kuri - A loyal little home robot with a cheerful personality