Mycroft.AI - Mycroft is the world’s first open source assistant.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
SEPIA Framework - SEPIA is a server-based, extendable, personal, intelligent assistant.
ioBroker - flexible and modular application for the IoT and Smarthome
Rhasspy - Rhasspy transforms voice commands into JSON events that can trigger actions in home automation software.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation