Like any good wiki, VoodooPad shows you a full history of your changes.

Of all the hundreds of ways of organizing information, a flexible, smartly linked wiki is one of the most modern, useful, and efficient. VoodooPad lets you easily whip up personal wiki pages including text, images, and more. If a word or phrase on a page needs further explanation, select it and click the Link button, and VoodooPad creates a whole new page for you to expand on it. Once you’ve created a page, any time you type the associated word or phrase, VoodooPad automatically links it to its page. Pages can have aliases, too—secondary words that link to the same place. For example, if you have a page about Apple, you can create an alias for AAPL (Apple’s stock market ticker code), and then every mention of that AAPL will also link to your Apple page.

VoodooPad integrates with some of your Mac’s built-in software, too. If you type a name that exists in your Address Book, VoodooPad automatically creates a link that lets you email that contact or open their Address Book entry. You can export your document, or individual pages, to a wide range of formats including HTML, PDF, and even ePub, and you can sync documents across Macs via Dropbox.

The bottom line. It can take a while to ramp up to VoodooPad’s full capabilities, but once you do, your wiki will grow like a weed.