@gustav I personally use Docusaurus (deployed via Vercel), but I'll be the first to admit it's not for everyone. There's a reliance on things being in a folder structure, which is a bit against the idea of a wiki. It's been a good place for me to dump thoughts and links though.
The digital garden communities are good places to look for resources. You might find something that strikes your fancy there.
This might be a good place to start 👇
https://github.com/MaggieAppleton/digital-gardeners#gardening-tools