CareUEyes - CareUEyes is an eye protection software for windows that comes with blue light filter, screen dimmer, and break reminder
ControlMyMonitor - View and modify the settings of your monitor from command line or GUI
Dimmer - A very small and free utility for Windows to reduce brightness on LCD/TFT screens.
Red Moon - Screen filter for night time phone use.
CF.lumen - CF.lumen is a powerful app for Android that adjusts the colors by detecting the position of the sun or according to custom settings.
Monitor Bright - Monitor Bright reduces with a simple trick the monitor brightness.