Apps similar to Candela include Twinkle Tray, which is free and open source. Other options are Crisp - Monitor Control, Dimly, MonitorControl and Monitorian. You can choose from more than 10 Screen Dimmers like Candela for Mac, Windows and Linux.
LiteBright is a lightweight native brightness controller for Windows 10 and 11. It lets you control brightness across multiple monitors from the system tray, adjust displays independently or together, and use global keyboard shortcuts for quick changes.
Free, open-source display control for Windows 11: one brightness slider for every monitor (DDC/CI and laptop panels), night light, focus mode, keep awake, per-monitor taskbar hiding and glass, OLED care, your monitor's own settings, hotkeys and a CLI.
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