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 nine alternatives to Brightness Master for a variety of platforms, including Mac, Windows, Linux, openSUSE and Python apps. The best Brightness Master alternative is Dimly, which is both free and Open Source. Other great apps like Brightness Master are MonitorControl, Monitorian, ddcutil and DDCcontrol.