Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
ioBroker - flexible and modular application for the IoT and Smarthome
EventMobi - EventMobi is an interactive mobile event app, audience response and engagement platform for conferences and trade shows.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets