Apps similar to LiteBright include Twinkle Tray, which is free and open source. Other options are Solace, MonitorControl, Monitorian and Dimmer. Screen Dimmers like LiteBright are a crowded field, with more than 25 alternatives for Windows, Mac and Linux.
Synchronize your external monitor brightness with built-in display. Application reads current brightness of your built-in display and passes it to external monitors via DDC interface. You can adjust brightness by menu in system status bar.
Adaptive per-monitor brightness manager for Windows that automatically dims inactive displays, with two-stage dimming, burn-in protection, break reminders, and energy usage statistics.
Germany
EU
darkbright-helper is a hotkey dimmer for Windows monitors that does not stop at 0%: it lowers the real backlight over DDC/CI, then keeps dimming with a black overlay below the hardware minimum.
GermanyEU
Monitor Bright reduces with a simple trick the monitor brightness. Useful to use the PC at night without getting blind if the minimum brightness that can be obtained adjusting monitor settings is still too high if compared to ambience brightness. Supports multi monitor systems.
ItalyEU
Focus view, extra brightness, ambient glow, and keep awake — all from your menu bar. JoyScreen transforms how you use your Mac.
PolandEU
A local-first Windows tray app that bundles per-app volume, monitor brightness, sticky notes, time tracking and a dozen other tools in one place.
United Kingdom
RomaniaEU
Python monitor control using the VESA Monitor Control Command Set (MCCS) over the Display Data Channel Command Interface Standard (DDC-CI).
