I use Perlite

What's wrong with Github? It will render your Markdown files, you can edit them anytime and it does not cost you any money. The site should be around for quite some time too, so no fear of losing links pointing to it in the future. As an additional bonus, you get free Git versioning too.

Personally, I use Hugo. Good for blog type websites.

Maybe this is too technical still, but Eleventy is a pretty cool project that can publish markdown.

https://www.11ty.dev/

A tool that works with markdown is tiddlywiki but I am not sure if it fits your needs.

If it is for documentation try docusaurus.

I recall seeing something like https://jamstack.org/generators/ and maybe https://github.com/myles/awesome-static-generators in the past, but I prefer to use https://orgmode.org/manual/HTML-export-commands.html and something similar to https://about.gitlab.com/blog/gitlab-pages-setup/#option-a-gitlab-ci-for-plain-html-websites

https://docs.gitlab.com/user/project/pages/getting_started/pages_new_project_template/#project-templates might be interesting to you

I use soupault for my static personal website.

You’d still need to create your templates, but I found it a lot more straightforward to use for a minimal than other static site generators.

It just generates a folder with your HTML files and resources that you could upload to any basic web host.

And it’s a self contained executable so you don’t need to install Node.js or anything else.

https://soupault.app/

I'm working on something kind of relevant. It's not ready yet but I'm wondering what features are requirements for you?