“With the latest version of VoodooPad, you can open up a web-based wiki for reading, editing, and saving! Download vpwiki and collaborate online with coworkers, friends, and even family members. Edit your site from within VoodooPad, or straight on the web.”
The vpwiki is a little webserver that renders the Wiki over HTTP/HTML and enables editing its content with VoodooPad. Very slick. It also has an API documented as Python code, so in principle it is possible to connect other applications to that – or – use VoodooPad to edit other content as long as the server implements that API.
This naturally has to be the next step for Wikis: define a common API. I found these bits on Google – I have no idea if these have much in common: