ZimWiki Markup Language (.wiki)
The WIKI file extension is associated with ZimWiki Markup Language, used by the Zim desktop wiki application for creating and managing personal wikis. It stores wiki pages in plain text files with wiki formatting, enabling features like linking between pages, simple text formatting, and attachments. Zim, developed by Jaap Karssenberg, is an open-source note-taking and personal knowledge base application written in Python. It supports various plugins for additional functionalities, such as task management and equation editing.