Materialiq is a collection of Materials for Blender 2.8+ designed from the ground up to take care of time-consuming tasks usually involved with creating and changing materials and instead allows the focus to be on other important aspects of the scene.
In materialiq, 90% of the materials use the same NodeGroup that lets you do the usual changes in exactly the same way.
Change diffuse+roughness texture strength and normal map strength, colorize it, play around with brightness / contrast / hue / saturation of the texture
or make the material's surface more rough or polished.
