In the world of niche projects this one is right up there, but you never know someone might want to use it.
I created an ESPHome external component that allows an ESP32-S3 to act as a Windows Dynamic Lighting USB Peripheral, this allows Windows 11 Dynamic Lighting to control the ESPHome lighting peripherals attached to the ESP32-S3. Which means that you can use this to control RGB fan lights in your PC or strip lights, or anything really. If you already have keyboards or mice etc that also use dynamic lighting then effects and colours can be synced across them.
It uses the TinyUSB ESP-IDF framework to create a USB-HID Lamp Array device on the USB port on the ESP32-S3, plugging this into Windows then allows the communication to the custom component and then on to the lamp arrays.
Please note this ONLY works on the S3 version as far as I know, the C3 etc don’t have the necessary USB stack in them.
The external component with examples are here on GitHub