Dokuwiki
self-hosted, wikis

Dokuwiki is an easy-to-use, lightweight, standards-compliant wiki engine with a simple syntax that allows reading the data outside the wiki. Under the GPL-2.0 license and written in PHP, Dokuwiki stores all data in plain text files, eliminating the need for a database. This makes it highly portable and flexible, as users can easily move, back up, and version control their wiki content using standard file management tools. With its intuitive markup language, Dokuwiki enables users to create and edit wiki pages without the need for complex formatting codes, making collaboration and knowledge sharing effortless and accessible to users of all technical levels.