Brightness Master is described as 'This small utility will try to make controlling your external monitor brightness and contrast easier. Also it have day and night presets, which stored in a right-click on a button' and is an app in the os & utilities category. There are seven alternatives to Brightness Master for a variety of platforms, including Windows, Linux, Mac, openSUSE and Python apps. The best Brightness Master alternative is MonitorControl, which is both free and Open Source. Other great apps like Brightness Master are Monitorian, ddcutil, DDCcontrol and QuickShade.