Mediawiki

A generic wiki platform that provides runtime services for applications built on top of it.

DokuWiki is a simple and versatile wiki software that stores data in plain text files.

BookStack is an opinionated platform for storing, organizing, and documenting information.

Wiki|Docs is a databaseless markdown flat-file wiki engine for creating and managing documentation pages.

LeoMoon Wiki-Go is a Go-based flat-file wiki for creating and managing documentation, knowledge bases, and collaborative content without an external database.

Raneto is a free, open, simple Markdown-powered knowledge base for Node.js.

Wiki CMS Groupware with the most built-in features.

Wiki-based system for collaborative creation and maintenance of websites.

A wiki engine based on Text::Amuse markup with a Git backend, designed for read-only, moderated, open, or private wiki sites.

W-CMS is a lightweight, open-source CMS for building websites with a flexible, page-based approach.

The most comprehensive and integrated Free / Libre / Open Source enterprise software suite.

Wiki.js is a modern, lightweight, and powerful wiki application built on Node.js.