Looks like wiki.js and BookStack both support Markdown.

I'm a big fan of Bookstack. The Docker images work great, also in Kubernetes. SSO is easy to set up as well, so if you're using something like Authentik for SSO, you can integrate it pretty easily.

Dokuwiki has a plugin that lets you use markdown instead of their proprietary markup.

I'm currently hosting a wiki.js
you can either use markdown or a visual editor

Obsidian is a fantastic note taking app that focuses on cross-linked notes, so is effectively a personal wiki.

It has a paid add on that lets you publish it to a website, or you can just do it yourself since the files are all Markdown.

Not sure if it's the kind of thing you had in mind, but I like TiddlyWiki for certain things like note-taking. (See here for saving/hosting options).

You could always just use a github repo as a wiki. It would render markdown pages in your browser, and it comes with built in version control!

https://github.com/logseq/logseq

wikijs comes to mind, it's deploy-able with a single docker command:

docker run -d \
--name=wikijs \
--restart=unless-stopped \
--publish 8080:3000 \
--env "DB_TYPE=sqlite" \
--env "DB_FILEPATH=/wiki/db.sqlite" \
--volume wikijs:/wiki \
--volume wikijs:/wiki/data/content \
ghcr.io/requarks/wiki:2

I use Silicon Notes; While it has 'Notes' in the title, it's just a lightweight markdown based wiki

I'll piggyback on this post in that I'm looking for a good ObsidianMD -> self-hosted wiki solution.

gollum is self-hosted and uses markdown by default

Obsidian, of course.

Try mdBook if you’re a rust person!

https://rust-lang.github.io/mdBook/

I personally use Grav. It's fully markdown bases and store the content in markdown files as well, instead of a database.
The Learn2 theme is the one for a documentation-style look. Check out the official documentation for how it looks and here's my own customized version.

I think you should specify whether you're looking for a wiki for personal use or shared use.

If you're looking for personal use, something like standard notes can be a great option.

If you're looking for shared use, and don't care about encryption, wiki.js is IMO your best bet.

There's currently no option that does both. Skiff exists as an encrypted collaborative notes option but it doesn't (to my knowledge) allow any kind of self hosting.

Simple, lightweight: raneto

I'm really liking mkdocs-material. Crazy lightweight. Very safe. And it looks nice.
https://squidfunk.github.io/mkdocs-material/

I stopped using it because it wasn't the best for the use case I was looking for but I'll plug SilverBullet. It is a well made program and seems very powerful from what I've seen

We use wiki.js at work and it is great. A nice benefit is you can track your articles in a git repository for granular change tracking.

Not sure about your use case, but check out HackMD.

nb is a command line and local web note‑taking, bookmarking, archiving, and knowledge base application.