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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Pro Allows adding custom elements
One can add actions, handlers and fromatters so it's not just about static markup
Designed to be easy for a human to enter with a simple text editor, and easy to read in its raw form.
Pro Supports namespaces
It allows pages to be divided among "directories / namespaces" using forward slashes.