Do you have your own private Wiki? Now you can: ZIM

Zim is a WYSIWYG text editor written in Gtk2-Perl. It aims to bring the concept of a wiki to your desktop. Every page is saved as a text file with wiki markup. Pages can contain links to other pages, and are saved automatically. Creating a new page is as easy as linking to a non-existing page. This tool is intended to keep track of TODO lists or to serve as a personal scratch book. But it will also serve you when writing longer and more complicated documents.

A "desktop wiki" means that we try to capture the idea of a wiki, not as a webpage but as a collection of files on your local file system that can be edited with a GUI application. The main focus is a kind of personal wiki that serves for all kind of notes: todo-lists, addresses, brainstorm ideas etc.

Check out some screenshots of the app: http://zim-wiki.org/screenshots.html

Download and installation instruction for both Linux and Windows available: http://zim-wiki.org/downloads.html