DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
XWiki - A powerful Open Source collaborative platform enhancing collaboration and communication.
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
TiddlyWiki - a non-linear personal web notebook
Confluence - Confluence is content collaboration software that changes how modern teams work
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.