i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
dwm - dwm is a dynamic window manager for X. It manages windows in tiled, monocle and floating layouts. All of the layouts can be applied dynamically, optimising the environment for the application in use and the task performed.
ioBroker - flexible and modular application for the IoT and Smarthome
Openbox - Openbox is a highly configurable, next generation window manager with extensive standards support.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation