Free Monitor Manager!

Screen dimming software that allows you to control the brightness of your screens as well as external monitors.

iBrightness Tray is a little bit of a swiss army knife display tool as adjusting the brightness of your screen is just one of three main functions it has. The other two are turning on your screensaver at the click of a button and also the ability to turn off the display completely. This is useful for laptop users when they want save power and switch off the screen for a period of time. Launch the portable executable and click the tray icon to popup the window where you can alter the brightness with the slider or activate the screensaver and screen off options. Right clicking the tray icon gives the extra options to start with Windows and change the default screensaver. »

Form 1 Hour Software by skrommel, it can dim the screen by applying a transparent gray layer on top of your opened applications

Shades is a FREE utility for controlling the brightness of your screen. It runs in the background providing always-available fine-grained control over the brightness of your display via a slick Mac-like interface.

ClickMonitorDDC lets you easily control monitor settings like bright and contrast, by using your keyboard or mouse. It can adjust brightness and contrast of external monitors by using DDC-protocol over monitor-cable (DVI, HDMI, DisplayPort, VGA). Nearly all monitors support DDC-protocol, but some monitors may not work because of faulty or no DDC-protocol.

Monitor Bright reduces with a simple trick the monitor brightness. Useful to use the PC at night without getting blind if the minimum brightness that can be obtained adjusting monitor settings is still too high if compared to ambience brightness. Supports multi monitor systems.