ShaderGraph: Color - Unity Learn

Shader Forge - A visual, node-based shader editor

Outline shader using shader graph tutorial for free

Download Super Duper Vanilla Shaders

Solas Shader

AstraLex Shaders 1.20, 1.19.4 → 1.18.2 (BSL Edit) — Shaders Mods

An Introduction to Blender Shader Nodes for Beginners

Blender: Introduction to Shader Editor - STYLY

I've written a new shader tutorial for Unity URP, explaining how to add lighting and shadows to an HLSL shader (no Shader Graph required!) Links in the comments