I've read good things about notion, obsidian and joplin.
What (technical) knowledge management tools is HN using for individuals and teams?
* https://github.com/ppeetteerrs/obsidian-zola
* https://github.com/ozntel/ozanshare-publish-plugin
It's also possible to do basic project management via kanban boards.
It might take a little to set everything up to your needs but I think it's a great tool for a small team.
Regarding the other comment: notion is basically just "a few webpages".