Dimly is described as 'Open-source lightweight macOS menu bar tool offering brightness, blackout, and sleep control for external monitors, with DDC/CI hardware fallback and custom profiles' and is a Screen Dimmer in the system & hardware category. There are more than 10 alternatives to Dimly for Mac, Windows and Linux. The best Dimly alternative is Crisp - Monitor Control, which is both free and Open Source. Other great apps like Dimly are MonitorControl, Vivid, Simple Screen Shade and Brightintosh.
Lumino is a Mac utility that automatically controls the brightness of connected external displays based on ambient light. It uses the built-in light sensor of supported Macs and works with DDC/CI when available, with fallback options for displays that don’t fully support...
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.
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