Where can you create specular images, bump maps etc?

Where does everyone get their images? There must be a converter out there, but I cant find one.

You can create many kinds of maps with Blender.

Using automatically generated specular maps and bump maps is an outdated workflow. Crazy bump was popular, and Substance B2M seems like a better, modern version.

Specular (roughness maps more like it) can be done by texture painting mode in most 3d apps, I would think so anyway. Normal maps are best made from a highpoly model, but if you want it quick and dirty from a texture and use PS there s always the trusty Nvidia plugin (Nvidia Texture Tools)