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.
Eye Yoga - Improve eyesight, relieve eye strain and prevent presbyopia.
Mata - The night vision for the web. Read easier on the eyes.
OKO - Increase ad earnings by having all major networks and exchanges compete for your ad impressions.
f.lux for iOS - Auto adjust your iOS display based on the time of day
Hawkeye - A useful app for GitHub Notifications