There is a growing need for basic converters (libraries) to convert Creole to XHTML in different programming languages. If you have written such a converter, please add it below. Ideally it can easily be imported and called with a single function, that will take Creole and spit out valid html/xhtml.

Does such a thing exist? Maybe someone is near completion and just hasn't added it to the wiki?

When adding a converter it would be helpful to note the license. GPL converters generally can not be used in non-GPL programs.

C

• Nyctergatis Markup Engine (NME), a C library with optional C++ glue (open-source, BSD license).

C#

ColdFusion

Common Lisp

Delphi

• DICreole, a Creole 1.0 converter for Borland / CodeGear Delphi. Based on NME, fully integrated, no external nor DLL files needed. Includes help and demo project. Freeware, BSD license.

Haskell

Java

• Java

JavaScript

• A prototype Javascript Creole 0.4 parser can be found at MeatballSociety:Creole/0.4

Lua

Perl

• Text::WikiCreole (Complete 1.0 plus extensions, plugins, etc)

PHP

• Text_Wiki_Creole on pear.php.net

Python

• You may want to take a look at Markdown in Python if you're considering doing this. Maybe you could use some of the code as a basis to speed up development.
• You can use the creole parser from MoinMoin 1.7 is now bundled separately, available at oink.sheep.art.pl/WikiCreole parser in python
• Creoleparser - built from scratch just for Creole :) MIT license Sandbox

Ruby

Why the languages above?

There exists a Markdown converter for eleven of the languages above. (http://en.wikipedia.org/wiki/Markdown) Sure, some of the languages are less important than others, but if we had all eleven languages we'd be as broad platform as Markdown.