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.
Monitor Bright - Monitor Bright reduces with a simple trick the monitor brightness.
LightBulb - Background application that adjusts screen gamma, making the colors appear warmer at night...
PangoBright - Screen dimming software that allows you to control the brightness of your laptop screens as well as external monitors.