Open-source alternatives to BetterDisplay

I want to pick an open-source replacement for BetterDisplay. Below is a list from Open Source Everything (CC BY-SA 4.0), in the order its website shows it. The order is a starting point, not a verdict. - MonitorControl: MonitorControl is a free app for Mac computers that lets you change the brightness, volume and contrast of external monitors from the Mac itself. It is for everyday Mac users who want to control a separate monitor with their keyboard or a menu bar slider. [Easy setup; Mac; replaces fully; MIT; https://github.com/MonitorControl/MonitorControl] - Twinkle Tray: Twinkle Tray is a Windows app that adds a brightness control to the system tray so you can adjust external monitors from your computer. It is for Windows 10 and 11 users who want to change brightness on several screens at once. [Easy setup; Windows; replaces partly; MIT; https://github.com/xanderfrangos/twinkle-tray] - Monitorian: Monitorian is a free Windows tool that lets you change the brightness of one or several monitors from a single place on your computer. It is for Windows users who have external monitors and want to adjust them without using the buttons on each screen. [Easy setup; Windows; replaces partly; MIT; https://github.com/emoacht/Monitorian] - ddcutil: ddcutil is a Linux command-line program that reads and changes settings on external monitors, such as brightness, color levels and input source, from the computer. It is for Linux users and system administrators comfortable with a terminal. [Advanced setup; Linux; replaces partly; GPL-2.0; https://github.com/rockowitz/ddcutil] Setup rating: "Easy setup" means you can install it like a normal app, use it in a browser. "Advanced setup" means you must run it on your own server or use the command line, or it is a tool for developers. Full details: https://opensourceeverything.org/data/groups/monitor-control.json Before recommending anything, ask me these three questions (one at a time, in plain words): 1) Which device or devices will I use it on (Windows, Mac, Linux, Android, iPhone)? 2) How comfortable am I with technical setup: only installing apps from a store, happy to follow a step-by-step guide, or comfortable with servers and the command line? 3) What is my budget: free only, or willing to pay for hosting or support? Then recommend one to three projects from this list only, and for each say why, using how fully it replaces the app, its setup rating, and the devices it runs on. If nothing on the list fits me, say so plainly instead of stretching.

Read the list of open-source projects at https://opensourceeverything.org/data/groups/monitor-control.json. Compare it with my project or idea below. Tell me which projects overlap, what I could reuse instead of rewriting, and what mine does that none of them do. My project or idea: