We'll create fresh WordPress site with WP-MarkupCollection installed. You have 20 minutes to test the plugin after that site we'll be deleted.
This plugin is developed on Github. To get full source code, see Github.
https://github.com/ko1nksm/wp-markup-collection
The external filter, you need to install the command.
Supported syntax are depend on those libraries or commands.
PHP Markdown, PHP Markdown Extra, PHP Markdown Lib
http://michelf.ca/projects/php-markdown/
PHP Textile
https://github.com/textile/php-textile/
PHP reStructuredText
https://code.google.com/p/php-restructuredtext/
Text_Wiki
https://github.com/pear/Text_Wiki/
HatenaSyntax
https://github.com/anatoo/HatenaSyntax
MultiMarkdown
http://fletcherpenney.net/multimarkdown/