Systemd is a Linux system and service manager that runs as PID 1. Its logo, designed by Tobias Bernard in 2019, derives from the iconic green [OK] boot messages and uses the colors systemd green and systemd black with the Heebo typeface.
A software engineer built a simple on-air light for his home office using a smart bulb and a Linux daemon that detects when his webcam is in use, automatically turning the light red to signal to family members that he's on camera without requiring manual toggling.