Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Deepgram - Search engine for speech
ioBroker - flexible and modular application for the IoT and Smarthome
Hidden Markov Model Toolkit - Hidden Markov Model Toolkit (HTK) is a portable toolkit used for speech recognition research, speech synthesis, character recognition and DNA sequencing.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Cassette - Transcribe, record & share conversations