One more item on ThemeClick.com on this category. Turn your WordPress site into a powerful wiki platform (like MediaWiki/Wikipedia). Allow users to edit pages from a front-end interface that integrates into your existing theme. Track pages for changes. Sort pages based on recent modifications. Define page edit permission based on user groups. Organize pages using a click-and-drag page tree. And much more!
Browse related pages without leaving the page you are viewing.
Whenever a wiki page contains links to other wiki pages on your site, clicking on that link will reveal an window with the page content and a link to view the full-sized page.
This feature is optional so you can turn it on and off as needed.
The administrator has complete over who can create and edit pages. What’s more, individual pages can be have their own custom user permission settings.
Archives & Sorting
Sort and manage your wiki articles: recently added, recently edited, recently discussed and alphabetical order. Additionally, you can use categories, tags and sub-pages.
Users can follow wiki pages to keep track of changes. The subscription manager displays recent changes to tracked pages. (Requires BuddyPress.)
Wiki pages can be flagged when they require attention due to poor or inappropriate content (much like Wikipedia/MediaWiki). What’s more, administrators can easily create custom flags using wp-admin.
History and Revision Notes
UserPress can compare changes to documents (diff) while also attaching a note with each revision.
When users are creating a new page, similar existing pages are automatically displayed in order to prevent duplicate content. We are sure after from the success installation from this item UserPress - Wiki Plugin For WordPress to your website you will be very satisfied