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.
Glimmer - Fast and light-weight UI components for the web
CareUEyes - CareUEyes is an eye protection software for windows that comes with blue light filter, screen dimmer, and break reminder
Preact.js - Preact is a fast 3kB alternative to React with the same modern API. Components & Virtual DOM.
Redshift Color Temperature Adjuster - Redshift adjusts the color temperature according to the position of the sun.
Svelte - Cybernetically enhanced web apps