Flutterby™! : Zim

The Flutterby.net web site is a set of Wiki markup files in a git repo, and some Perl to turn 'em into HTML. All evidence of reality to the contrary, I'm pretty convinced that the future isn't web apps, so I've been on the lookout for tools like this:

http://zim-wiki.org/

Zim is a graphical text editor used to maintain a collection of wiki pages. Each page can contain links to other pages, simple formatting and images. Pages are stored in a folder structure, like in an outliner, and can have attachments. Creating a new page is as easy as linking to a nonexistent page. All data is stored in plain text files with wiki formatting. Various plugins provide additional functionality, like a task list manager, an equation editor, a tray icon, and support for version control.