Creating normal- or height map maps from diffuse map? (/albedo/base color)

It can be done in Photoshop with the Xnormal filter.
Watch this:
https://www.youtube.com/watch?v=_WF8PBT97N4

I use Awesome Bump, which is quite fantastic... and free! Problem is, to get it working on mac, you have to build it from source, I haven't tried it myself but peolple say it's working.

Here's the files
https://github.com/kmkolasinski/AwesomeBump

Here detailed instructions on how to build it
https://github.com/kmkolasinski/AwesomeBump/releases/download/BuildingAB/BuildingInstruction.pdf

There are several tools for Photoshop which you can download for free, however if you are looking for tech that can give good results, then its unlikely you'll be able to find free options.

Its not free, but i use Bitmap2Material for creating different maps from an image.

Thanks, everyone, for your help!