There is a [Creole parser plugin|] for the [MoinMoin wiki engine|].

It is based on the [Creole0.1] draft.

There were several issues when writing it:
* The bold/italics don't work properly in all cases yet, there is a problem of how to determine whether '**' or '//' is closing or opening. I think I will solve it by just keeping the state in a separate variable, but that's not nice.
* The line breaks are a major pain. Currently I only add them inside paragraphs, and I included a special case that will not add a line break at the end of a paragraph if it is followed by an empty line. The line break is however added if the paragraph is followed by a list or a preformatted block, and I personally don't feel like adding more lookahead special cases.
* I'm a little bit generous when parsing mixed lists. This is valid:

# One
- Two
- Three
# Four

and gets rendered as:

# One
** Two
** Three
# Four