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.
Cost / License
- Paid
- Proprietary
Platforms
- Windows
MonitorControl Alternatives
MonitorControl is described as '🖥 Control your external monitor brightness & volume on your Mac' and is an app in the audio & music category. There are more than 10 alternatives to MonitorControl for a variety of platforms, including Mac, Windows, Linux, openSUSE and Python apps. The best MonitorControl alternative is Twinkle Tray, which is both free and Open Source. Other great apps like MonitorControl are Dimly, Monitorian, ddcutil and Brightintosh.
Alternatives list
Simple Screen Brightness is a small portable application written in C# that allows you to adjust the brightness for all of your connected monitors using a slider without having to use their difficult-to-use built-in menu systems.
Cost / License
- Free
- Open Source
Platforms
- Windows
Python monitor control using the VESA Monitor Control Command Set (MCCS) over the Display Data Channel Command Interface Standard (DDC-CI).
Cost / License
- Free
- Open Source (MIT)
Platforms
- Windows
- Linux
- Python
M- 31 BrightXDR alternatives
Free and Open Source alternative to Vivid macOS application to extend Apple XDR display brightness from 500 up to 1600 nits.
Cost / License
- Free
- Open Source (GPL-3.0)
Platforms
- Mac
B 
Focus view, extra brightness, ambient glow, and keep awake — all from your menu bar. JoyScreen transforms how you use your Mac.
Cost / License
- Paid
- Proprietary
Platforms
- Mac
Poland
EU
Unlike MonitorControl, Brisync require you to have your built-in display on.