f.lux - f. lux is a piece of software for Windows, Mac, Linux, iOS, and Android that provides a blue light filter over your screen. Research suggests limiting our exposure to blue light in the hours before bedtime can help us fall asleep faster.
Mata - The night vision for the web. Read easier on the eyes.
Shifty - More control over macOS Night Shift
f.lux for iOS - Auto adjust your iOS display based on the time of day
Flux - Application Architecture for Building User Interfaces
Lumen Framework - The stunningly fast micro-framework by Laravel.