Zim is not the only Unix desktop wiki that can be run in Windows today. Tomboy is another one. The instructions for installing Tomboy for Windows are here.
You need first to install Novell's gtk-sharp 2.12.8 or newer, but it's really a cinch.
Not that it's worth it. It's true: "Tomboy is a desktop note-taking application for Linux and Unix. Simple and easy to use, but with potential to help you organize the ideas and information you deal with every day." It now also works in Windows. But that's about it. The search features are rather underdeveloped, and there are no categories or anything else worth speaking of. It does not do anything that ConnectedText or even Zulupad can't do just as well. I will probably delete it just as quickly as I did Zim.
But here is a picture, anyway: