PuTTY - Popular free terminal application. Mostly used as an SSH client.
CareUEyes - CareUEyes is an eye protection software for windows that comes with blue light filter, screen dimmer, and break reminder
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Dimmer - A very small and free utility for Windows to reduce brightness on LCD/TFT screens.
iTerm2 - A terminal emulator for macOS that does amazing things.
myPoint Shade - Stop burning your eyes! myPoint Shade is caring for your eyes' comfort.