| Elaborate wiki engine: Elaborate is a free wiki engine written in PHP and MySQL available under the GPL |
| MediaWiki: Wikipedia's underlying open source wiki engine. |
| net.nemein.wiki: Open source wiki engine written in PHP for the Midgard Content Management System. |
| Particle Wiki: A light PHP/MySQL wiki engine with archived history, search, admin panel and skins (released under proprietary Particle Soft End User Licence). |
| PHPWiki: Feature-rich implementation with support for various databases. |
| PmWiki: A simple-to-install system which allows password protection and organization of pages into groups (GPL). |
| sfWiki -- a Wiki for SourceForge sites: Implementation with MySQL backend for use on sites hosted by SourceForge. |
| Tiki: A kitchen-sink content management system that combines wiki with a Slashdot-style article system, blogs, forums, image galleries, chat, and so on. Pear:DB backend, LGPL. |
| Wacko Wiki: Small, lightweight, handy, expandable, multilingual Wiki-engine based on Wakka Wiki. WYSIWYG editor, easy installer, many localizations, email notification on changes/comments, several cache levels, design themes (skins) support, XHTML compliance, page rights (ACLs), page comments. |
| Wikepage: Wikepage is an easy to use and small dual-mode wiki engine that can act as wiki sites and personal homepages. |
| Wikini: Open source wiki, based on Wakka Wiki, nhanced (XHTML 1.0 and CSS compatibility) and translated into French. |
| WikkaWiki: A free PHP/MySQL wiki engine based on forked code from WakkaWiki, with a number of features beyond the original Wakka, including a GUI page editor, advanced syntax highlighting and mindmap support. Released under GPL. |
| Wikki Tikki Tavi: A PHP script that runs wiki sites. |
Classical
