I was comparing wiki softwares over at wikimatrix.org and this is the list I came up with.
There were a number of things I required to make that list. It must be software I can install which is free. It must not require root access or anything super crazy to run. It must support MySQL. It must support revisions, page permissions, unicode, and file attachments. I docked points aggressively for software packages that had other things I felt were weak, such as no XML/HTML export, no tables support, no commenting system, no email notifications, no full-text search, or no recent updates to name a few. Some also lost points for only supporting features I consider critical through a plugin or a patch.
As it is there are still a couple on that list that I consider weaker than others, like Wicked for example.
