reStructuredText
Invented for Python documentation.
20 Alternatives To reStructuredText
BookStack
An open source knowledge management application that’s focused on ease of use. BookStack is a simple, self-hosted, easy-to-use platform for organising and storing information.
BookStack is fully free and open, MIT licensed.
Confluence
Confluence is content collaboration software that changes how modern teams work
DokuWiki
DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn’t require a database. It is loved by users for its clean and readable syntax. The ease of maintenance, backup and integration makes it an administrator’s favorite.
GitBook
Modern Publishing, Simply taking your books from ideas to finished, polished books.
Gitit
Gitit is a wiki backed by a git, darcs, or mercurial filestore. Pages and uploaded files can be modified either directly via the VCS’s command-line tools or through the wiki’s web interface.
Inkdrop
The note-taking app with robust Markdown editor, supporting macOS, Windows, and Linux.
Instiki
Instiki is a basic Wiki clone so pretty and easy to set up, you’ll wonder if it’s really a Wiki.
JBake
“Jekyll of the JVM”
Jama Connect
Collaborate with your team and share the data you care about in one place
Markdown by DaringFireball
Text-to-HTML conversion tool/syntax for web writers, by John Gruber
MediaWiki
MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia. The MediaWiki software is used by tens of thousands of websites and thousands of companies and organizations.
MoinMoin
MoinMoin is an advanced, easy to use and extensible WikiEngine with a large community of users.
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.
Org mode
Org: an Emacs Mode for Notes, Planning, and Authoring
TiddlyWiki
TiddlyWiki — a non-linear personal web notebook
Typora
A minimal Markdown reading & writing app.
WackoWiki
WackoWiki – Small, lightweight, handy, expandable, multilingual Wiki-engine. It’s designed for speed and extensibility.
Includes a WYTIWYG editor, easy installer, many localizations, email notification on changes/comments, several cache levels, design themes (skins) support, template engine, URI router, HTML5 compliance, page rights (ACLs), page comments and is distributed under BSD-License.
XWiki
A powerful Open Source collaborative platform enhancing collaboration and communication.
a very robust WYSIWYG editor a powerful wiki syntax strong rights management responsive skin advanced search unique set of applications
wikidPad
wikidPad is an application for storing thoughts, ideas, todo lists, contacts, or anything else that user can think of to write down.