What kind of web server is there for listing files?

Question

linux

Good afternoon!
A few months ago I stumbled upon some kind of web server, sharpened specifically for listing.
A few days later I saw that it was he who was used in some kind of repository, instead of the traditional Apache / Nginx.
What I remember is the design with gray tones.
If my memory serves me, then there was a directory tree on the left, and a listing of the selected directory was displayed on the right. But this is where I could be wrong.
Can you please tell me what is this server?
Thanks in advance!

Answer 1

You may have seen h5ai . Shows a tree, generates previews, can give entire directories in the archive.