Kumux - Kumux is a smart circadian color scheme designed for software like code editors.
Dimmer - A very small and free utility for Windows to reduce brightness on LCD/TFT screens.
Nocturne - Nocturne is simple app for switching a computer to night vision mode.
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
Simple Screen Shade - Description and screenshots of Simple Screen Shade.