I have been working on a Google Appengine Wiki to host some of my hobby projects and used GeaWiki as a base for the wiki development.
The outdated GaeWiki application source needed an update for latest appengine with Python 2.7 and while working on the migration I took the effort to implement html5 (Bootstrap) responsive design.
BGAEWiki is a simple to use wiki system which is ready to deploy on Google Appengine. The responsive design improves the mobile experience.
Great for collaboration and "private" projects including all the usual functionality's one might expect from a Wiki (labels, wikilinks etc.).