Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
CKEditor - Real-time collaborative future-ready rich text editor
ioBroker - flexible and modular application for the IoT and Smarthome
Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.