We use gitit [1]. It supports a number of syntax formats, including Markdown. It supports a number of revision control systems to use as the file store, such as git. I very rarely use the web interface, as I prefer to use the wiki from the command line, using vim for editing. Use of git also allows team members to easily clone the repository and use it even without access to the server.
Note that you can also edit text in Firefox textboxes with the editor of your choice using the "It's All Text!" add-on [2]. I have my browser configured to use gvim, so I can use vim to edit everything from emails and wiki content to this HN comment. :)
Oh gosh, I've always wanted something like "It's all text", but I never bothered looking if anything of the sort
existed. This certainly removes the need for having to store the files on disk in such a way that they're
accessible to gvim, awesome!!
Note that you can also edit text in Firefox textboxes with the editor of your choice using the "It's All Text!" add-on [2]. I have my browser configured to use gvim, so I can use vim to edit everything from emails and wiki content to this HN comment. :)
[1] http://gitit.net/ [2] https://addons.mozilla.org/en-US/firefox/addon/its-all-text/