Wikipedia

DokuWiki

DokuWiki is a simple to use Wiki aimed at a small companies documentation needs. It works on plain texts files and thus needs no database. It has a simple but powerful Syntax which makes sure the datafiles remain readable outside the Wiki.

http://www.splitbrain.org/projects/dokuwiki
Free
http://i.imgur.com/RHK64T9.png
WackoWiki

WackoWiki is a Wiki engine that uses PHP and MySQL. It provides access controls (ACLs) for each page, a WYSIWYG editor, localizations for a number of languages, email notification on changes and comments, several cache levels, design themes or skins, XHTML compliance, page comments, etc.

http://wackowiki.org/HomePage
Free
http://i.imgur.com/RHK64T9.png
Wikipedia Clone | Wikipedia Clone Script | PHP Wikipedia Clone | PHP Wikipedia Clone Script

Wikipedia Clone is basically an encyclopedia from where you can get basic information about anything you need. Whether you are looking for a ready made Wikipedia Clone or a custom development, NCrypted has the right solution for your business needs.

http://wikitravel.org
Free
http://i.imgur.com/RHK64T9.png
WikiWig

Wikiwig is as free wiki (GPL) with wysiwyg features. * Easy for anyone to modify each page of the wiki with little or no technical knowledge * Rich wysiwyg editor (Xinha ) with : bold, italic, underlined, etc o link editor : external and internal links o image manager : upload, rotation, resize, crop, visual browsing… o complex table editing * html view * html tidy (for copy-paste from msword for example) * Conflict prevention system (lock) to avoid 2 authors editing the same page at the same time * Automatic save dialog when quitting with changes pending * Page and folder creation and deletion. Folder moving (pages in the future) * multilingual interface (french, english, german and simplified chinese) * simple automatic install on most hostings * versioning (but no restoration for the moment except by ftp)

http://wikiwig.sourceforge.net/
Free
http://i.imgur.com/RHK64T9.png
WikyBlog

WikyBlog is a groupware platform that fuses the collaborative editing features of wikis with the user friendly publishing characteristics of blogs. Designed for speed and ease of use, WikyBlog has a unique AJAX enhanced tabbed interface that enables users to view and edit multiple files within the same page. Custom templates, file attachments, a flexible user privilege system, and Google Maps number among its many features.

http://www.wikyblog.com/
Free
http://i.imgur.com/RHK64T9.png
WordPress Wiki

It used to be the case that if you wanted a wiki alongside your blog you had to go out and install Mediawiki, TWiki or PMWiki… but not anymore! This elegant, powerful WordPress plugin allows you to simply create as many wikis as your want on a single, Multisite or BuddyPress WordPress installation. Simply add to your WordPress site ALL the functionality that you get in any major wiki platform, and style it to fit the rest of your site (although it looks pretty fine out of the box!)

http://premium.wpmudev.org/project/wordpress-wiki/
Free
http://i.imgur.com/RHK64T9.png