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.
MobileFence - Parental controls for Android devices.
CareUEyes - CareUEyes is an eye protection software for windows that comes with blue light filter, screen dimmer, and break reminder
Boomerang Parental Control - Boomerang Parental Control helps parents start conversations with their children's technology use: App Controls, Text Monitoring, Time Limits and more.
LightBulb - Background application that adjusts screen gamma, making the colors appear warmer at night...
Qustodio - Free parental control software. Monitor and track your child's online activity. Block dangerous sites and protect kids from online bullying.