DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
CherryTree - A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.
TiddlyWiki - a non-linear personal web notebook
Turtl - The secure, collaborative notebook