Open Source Wiki softwares

DokuWiki

Cross-platform

DokuWiki is a simple to use Wiki aimed at a small companies documentation needs. (GPL)

LionWiki

Cross-platform

LionWiki is a minimalist Wiki engine programmed in PHP. It is extensible, templatable, file based and requires just one file to function. (GPL)

MediaWiki

Cross-platform

MediaWiki is a free software wiki package originally written for Wikipedia. (GPL)

MindTouch Deki

Cross-platform

MindTouch Deki is a free open source wiki and application platform for communities and enterprises. (GPL)

MoinMoin

Cross-platform

MoinMoin is an advanced, easy to use and extensible WikiEngine with a large community of users. (GPL)

PmWiki

Cross-platform

PmWiki is a wiki-based system for collaborative creation and maintenance of websites. (GPL)

TiddlyWiki

Cross-platform

TiddlyWiki is a single html file which has all the characteristics of a wiki; including all of the content, the functionalityand the style sheet. (BSD)

TikiWiki

Cross-platform

TikiWiki (Tiki) is your Groupware/CMS (Content Management System) solution. (LGPL)

TWiki

Cross-platform

TWiki is a flexible, powerful, and easy to use enterprise wiki, enterprise collaboration platform, and knowledge management system. (GPL)

Wiki Web Help

Cross-platform

AJAX wiki that operates like a desktop help viewer. (MIT)

XWiki

Cross-platform

The XWiki project offers both a generic platform for developing collaborative applications using the wiki paradigm and products developed on top of it. (GPL)