Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Coountdown - 3 2 1 ! Create day counter on menu bar macOS. 🚀
ioBroker - flexible and modular application for the IoT and Smarthome
Timetaco - Create your own countdowns, as easy as 3, 2, 1
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Padbury Clock Screensaver - Minimal screensaver for Mac