TiddlyWiki - a non-linear personal web notebook
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
wikidPad - wikidPad is an application for storing thoughts, ideas, todo lists, contacts, or anything else that user can think of to write down.
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
Knowledge Workshop - Learning Management Solutions provides innovative and reliable software for the knowledge worker.
Wiki on a Stick - Self-contained desktop wiki