DisplayBuddy lets you control the real brightness of your monitors directly from your Mac - no need to touch your clunky monitor buttons!
It has been tested on a wide range of monitors from manufacturers such as Dell, Acer, LG, Samsung, BenQ & Asus, and works flawlessly with most displays.
DisplayBuddy is a full fledged display manager for Mac and can also control the volume for monitors with built-in speakers.
Works great with my LG and Dell monitor!