Socialtext-wiki-syntax-highlighting is a project mainly written in Vim Script, it's free.
Syntax highlighting and an ftplugin for Socialtext wiki
This is a mirror of http://www.vim.org/scripts/script.php?script_id=2131
Syntax highlighting for the Socialtext wiki, http://www.socialtext.net/. Also a filetype detection script which sets appropriate buffer-local options for editing long lines, etc.
Latest copy can be found at http://www.georgevreilly.com/vim/stwiki/