There are 1 repository under neopixel-matrix topic.
Patterns for NeoPixel strips and matrixes including the patterns of the NeoPattern Example by Adafruit.
A hardware based animation library,pixel driver & dynamic led mapping system for addressable LEDs
Arduino Library for Pixel and Play
NodeMcu Based Smart Neopixels Array WiFi Lamp's Firmware.
Video Recorder With Viewfinder, Streamer, Clock, ... and Snakes!
CircuitPython code to create sound reactive Neopixels on a rp2040 Feather and Neopixel Featherwing embedded in a 3D printed Audioengine P4 / A5 speaker stand.