Wiki

Wiki.js is open source, built upon Node.js. It saves all content directly in Markdown (.md) files and syncs with your remote Git repository.

A non-linear personal notebook written in JavaScript used as a single HTML file in the browser or as a powerful Node.js application.

Java based wiki with a plethora of options. It can run on a Servlet Container like Tomcat, Jetty, JBoss, WebLogic, WebSphere, etc. It can run on almost any database (HSQL, MySQL, PostgreSQL etc) but correct setup is needed.

Open source lightweight static documentation builder that uses MarkDown files to build a complete website.