Wicked is a Wiki for the Horde framework. It uses PEAR's Text_Wiki package for markup rules, parsing, and rendering. It supports Creole, Mediawiki, Tiki Wiki, and its own markup engine.
Wiclear aims to provide a simple, small, and accessible wiki. It supports the XHTML and CSS W3C specifications. There is a simple install program and an admin panel.
WiGit is a simple and light wiki, written in PHP and using Git as a backend for tracking changes. Features include easy customization, extensive Textile markup syntax, full history tracking, basic support for users, and support for pretty URLs.
Wikepage is a wiki-standard, easy
to use and small wiki software derived from Tipiwiki2. Wikepage has some security features that Tipiwiki does not have, like password protected structure, and two patched important security flaws fixed.
Wiki on a Stick
"Wiki on a Stick" is a personal wiki that lives in a single self-modifying HTML file that contains the software, interface, and database. It's useful for taking notes, for use as a calendar, and for documenting software, etc.
Wiki Type Framework
WTF is not a Wiki engine, although it can be used as one. It is actually a generic web content management engine allowing you to create web documents easily from the comfort of your browser.
wikiup is a command line utility which uploads content (as
attachments) to a Foswiki or TWiki site.
WikkaWiki is a flexible and lightweight wiki engine written in PHP, which uses MySQL to store pages. Forked from WakkaWiki. Designed for speed, extensibility, and security. Released under the GPL license. Read more
WikkiTikkiTavi is a script that runs wiki sites. It supports versioning, unicode support, edit-rate limiting scheme, and more.
WikklyText is a wikitext engine that is compatible with the TiddlyWiki markup language. It can be used both as a Drupal plugin as well as for creating standalone (X)HTML documents. It is written in Python for portability and is not tied to any particular Web framework.
Wixi is a personal wiki-like application for the desktop. It can be used to store information in an organized way. Pages are rendered to HTML and can be accessed in a tree of categories.
yet another wiki. Features include: search engine (jakarta lucene) integrated, versioning of every page.
yet another wiki clone: yawk does not require a certain HTTP server like apache nor an installed database.