Wiki Plugin Turns any WordPress site into a fully functional, easy to use, wiki. You can even create multiple wikis on one site. Wiki is all you need to transform any WordPress site into a powerful, yet easy to use, wiki site with all the core features that MediaWiki has. This elegant, powerful WordPress plugin allows you to easily create as many wikis as you like on your WordPress, Multisite or BuddyPress installation.
Simply add Wiki to WordPress to get ALL of the functionality you would expect from a major wiki platform. Wiki works out of the box with any WordPress theme and you can quickly style it to fit your own unique demands.
Demo & Source
Download Wiki WordPress Plugin