Zim is a desktop knowledge management application structured (or unstructured) similarly to web-based wiki software. Users enter data in a wiki-like markup that is stored internally in plain text files. Individual pages are placed into a folder structure that can be viewed either as a tree or an outline. To create new pages, simply add a link that directs to a page that does not yet exist. Additional features like equation formatting, task list management, and change tracking can be added using plugins. Readers will find detailed Zim usage instructions, including a brief Getting Started guide, linked on the Manual page. The Download page contains installers for Windows and Ubuntu Linux. Most other Linux distributions and all the major BSDs include Zim in their package management systems. MacOS users can install Zim using macports or nixpkgs. Zim is free software, distributed under the GNU General Public License, with source code available on GitHub.