WackoWiki is a light and easy to install multilingual Wiki-engine. Supports WYTIWYG-editing, page rights (ACLs), design themes (skins), file upload, email notification and much more. Compatible with PHP 7.2 / 7.4 and MariaDB / MySQL.
Information about the markup language can be found here.
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Designed to be easy for a human to enter with a simple text editor, and easy to read in its raw form.
Pro Allows adding custom elements
One can add actions, handlers and fromatters so it's not just about static markup
Pro Supports namespaces
It allows pages to be divided among "directories / namespaces" using forward slashes.