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.
SwitchResX - SwitchResX is a tool designed to manage resolutions of all your monitors and HDTVs.
LightBulb - Background application that adjusts screen gamma, making the colors appear warmer at night...
EasyRes - EasyRes is a fast screen resolution switcher for Mac OS X with live animated previews.
CareUEyes - CareUEyes is an eye protection software for windows that comes with blue light filter, screen dimmer, and break reminder
Resolutionator - Resolutionator makes it simple to use any of your display's available resolutions.