There are of course, a lot of Wiki software, out of which the most popular, is of course, the beloved MediaWiki (when writing that, I'm already using
[[MediaWiki]] for links, instead of standard Markdown
[MediaWiki]() : ) . . . ), which most wikis, including Wikipedia, and Wikias, run on.
But there are other wiki softwares too, and after MediaWiki, the most popular of which is DokuWiki, which claims to have a readable syntax, as it uses
**bold**, etc., other than some other wise standard MediaWiki syntax ("WikiText"/"WikiMarkUp").
So,... are those on-topic? I hope they are.
On a related note, Wikia offers a heavily-modified [] version of MediaWiki, so are these extra features also on-topic?
[]: Including Blogs, Chat Rooms, Forums (and possibly Q and A sites too, soon), the "Oasis" skin, and Special:CSS for wikias that enable Darwin.