+* The [GNU Hurd](http://www.gnu.org/software/hurd/)
+* [DragonFly BSD](http://www.dragonflybsd.org/)
+* [Monotone](http://monotone.ca/wiki/FrontPage/)
+* The [Free Software Foundation](http://fsf.org) uses it for their internal wiki, with subversion.
+* The [cairo graphics library](http://cairographics.org/) website.
+* The [Portland State Aerospace Society](http://psas.pdx.edu) website. Converted from a combination of TWiki and MoinMoin to ikiwiki, including full history ([[rcs/Git]] backend).