VisualAct makes a lot of Maya Arnold Shaders from their collections available for free.
VisualAct is a publisher of shaders, light kits, and assets. Recently they’ve made a massive list of their Maya Arnold Shaders available for free. You may remember the company offering an Arnold shader pack named the survival pack. The package is a material library that provides a set of commonly used materials that can help jumpstart your look-dev process.
Now VisualAct has made a swath of Maya Arnold Materials that you can download for free from their site. The material range from all kinds of metal to various plastics, rubber, and some abstract shader as well. Visit VisualAct to learn more and download some free Maya Arnold Shaders.