Twinkle Tray enables brightness control on external displays in Windows 10 & 11. Even th Windows is capable of adjusting the backlight on most monitors, it doesn't support external monitors natively.
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Brightintosh AlternativesScreen Dimmers and other similar apps like Brightintosh
Brightintosh is described as 'BrightIntosh is lightweight, works system-wide, has optional launch-at-login functionality and includes a global hotkey to toggle the extra brightness' and is a Screen Dimmer. There are more than 25 alternatives to Brightintosh for a variety of platforms, including Windows, Mac, Linux, Android and Chrome OS apps. The best Brightintosh alternative is Twinkle Tray, which is both free and Open Source. Other great apps like Brightintosh are MonitorControl, Dimmer, Monitorian and PangoBright.
Alternatives list
29 Twinkle Tray alternatives
Cost / License
- Free
- Open Source (MIT)
Platforms
- Mac
+2
24 Monitorian alternativesMonitorian is a Windows desktop tool to adjust the brightness of multiple monitors with ease.
54 PangoBright alternativesScreen dimming software that allows you to control the brightness of your screens as well as external monitors.
- 13 ddcutil alternatives
Most monitors, other than laptop displays, have a Virtual Control Panel (VCP), which implements features defined in the Montor Control Command Set (MCCS). Typically, ddcutil communicates with the monitor's VCP over an I2C bus, as per the Display Data Channel/Command...
Cost / License
- Free
- Open Source (GPL-2.0)
Platforms
- Linux
D 
Cost / License
- Freemium
- Proprietary (MIT)
Platforms
- Mac
16 DisplayBuddy alternativesDisplayBuddy lets you control external displays connected to your Mac right from your menu bar! No need to touch your clunky monitor buttons!
+4
Velis Auto Brightness is a pretty powerfully adjustable auto-brightness app for your android device.
Cost / License
- Freemium
- Proprietary
Platforms
- Android
- Android Tablet
+2
CareUEyes is a very simple but useful program when it is about your eye care. The program comes with a very simple and clean interface and needs to technical knowledge. Even a novice computer user can download and use it easily.
- 20 monitorcontrol (Python) alternatives
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 
DDCcontrol is software for controlling monitor parameters such as brightness, contrast, and RGB color levels. It includes a command-line tool and a GUI tool.
Cost / License
- Free
- Open Source (GPL-2.0)
Platforms
- Linux
- openSUSE
- Fedora
- Ubuntu
- Debian
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