Sadly, it seems it is just hugo. He mentions hugo in a post[1].

[1]: https://andreyor.st/posts/2020-06-05-managing-background-pro...

He definitely is using Emacs for most of it. He authors his posts in org files, and uses ox-hugo to export to Hugo.

I do something similar for my blog, except Pelican is my backend.

https://andreyor.st/posts/2022-10-16-my-blogging-setup-with-...

Interesting. I think I must've seen the same post when he posted it. Nowadays I just use Pandoc to go from markdown (with extras) to html.

Being an Emacs guy, I can recommend weblorg - I guess most people haven't heard about org-mode indeed, but it's one of the biggest reasons I stuck to Emacs, worth a look.

Got curious what this guy uses for the site, but couldn't find a public repo for it with a few minutes of digging. Mostly you couldn't really tell what static site generator someone uses unless it's one that supports themes, and they use one of the popular ones.

I used to give all my technical presentations in Emacs. https://github.com/jrockway/eslide

I have not tested it on modern Emacs, but it was fun to write. (It basically finds the largest size that each slide can be displayed in, and displays it at that size. And it of course syntax highlights code blocks with Emacs.)