There are 3 repositories under metal-shader topic.
LYGIA, it's a granular and multi-language (GLSL, HLSL, Metal, WGSL, WEGL and CUDA) shader library designed for performance and flexibility
Shape Animation Examples using SDF with MSL (Metal Shader Language)
Add variable blur to images in UIKit, AppKit and SwiftUI.
opengles 2.0 light engine + tutorials for iOS.
C++ cross-platform gpu SDK
Solar System demonstration using Apple MetalKit
Articles I like
A simple Metal shader project that creates a smooth, animated wave effect using Metal Shading Language (MSL) with customizable animation speed.
Offline shader compiler with SPIR-V reflection support.