Rendering wiki markup

the app i am currently working on has a set of static documents/articles
that users can select…

alot of these are documents that have links to articles on other sites,
etc… and are edited fairly regularly by the site administrators…

all the admins are totally down with wiki markup, and i think it makes
sense to store that info in wiki format, so they can edit it easily…

my question is…

is there something that will render wiki markup stored in active record?

thanks!