Ptolemee is a PBR material organizer that offers a real-time preview. It is a handy tool for people with large materials collection.
It will automatically scan your materials folder and assign matched image to the suitable usage in the shader. The preview supports: Diffuse, normal, specular, roughness, metallic, emissive, opacity, opacity mask, subsurface scattering and displacement.
That is really nice way to browse a folder and directly see the displacement in action, you even can change the tesselation of the model.
As it is a real-time viewer you can change the angle of the lighting and see right away how light will affect your material.
Once you matched all the images composing your material, you can then render a thumbnail preview that will be saved in the same folder.
Finally, tags can be applied to each material. Combining these two features, you can have a nice way to quickly compare all your wood materials for example, to better choose the one that suites the most.
Available for Windows 10 PC and mac OS.