Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Dozuki - Dozuki is a web-based tool for creating and distributing step-by-step documentation.
ioBroker - flexible and modular application for the IoT and Smarthome
DocGen - Static website generator
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
openSourceCM - Web-based legal document processing and contract management