Wiki that can be integrated into a web-application

Question

I've been thinking about integrating a wiki into my web-application. Currently I'm testing MediaWiki API (web-services interface), but my intended usage will most likely conflict with the GPL license. Some parts of my web-application is closed source.

Does anyone have good experiences or recommendations for a Wiki (with BSD-license or similar) that have a web-services interface that will allow me to retrieve/create articles (both formated and raw text) and supports userrights-management.

Answer 1

It's commercial, but Confluence by Atlassian has a good API.

Answer 2

You can have a look at XWiki too, as I know it's a quite good and evolving wiki applicaiton. I am not sure about the Web services links, but there is quite complete document for developers to use and communique with XWiki.

Edit: I forgot to say that XWiki is under LGPL Open-source licence.