Sinapse Lite

Sinapse Lite is an ultra-small wiki package that uses MySQL as a backend. This powerful system allows for users to modify existing posts or create new ones, with a unique BB-code-esque system, such as using [mark="name"] to mark a location and [goto="name"]Go here[/goto] to go to the named mark, and also allows for linking to other topics by encasing them in brackets. There is also a great revision system that compares changes to previous revisions by percent so you can tell if someone had abused the topic and replaced more than they should have. It is possible to load these revisions. This script was developed by Scott Fitzhugh. Please visit the site to see a demo of this awesome application.

Wikiwig : the first Wysiwyg Wiki

Wikiwig is a free WYSIWYG-WIKI. It combines shared-working possibilities of Wikis with a Wysiwyg user-friendly interface (HtmlArea3). You don't need to know any wiki-specific syntax anymore to create and modify pages : simply design your page like in a word-processor. Hot features : image manager (allowing upload, rotation, resizecrop), visual browsing / Conflict prevention system (lock) to avoid 2 authors to edit same page at the same time, alert system to stay informed when major changes appear on a page you decided to be and much more

Tiki

Tiki features a Wiki, Image galleries, File galleries, Forums, Polls, Chat, RSS feeds, Articles, Submissions, Weblogs, Webmail, Surveys, Trackers, Newsletters and more. Themes can be created using CSS. Everything is customizable, Tiki uses Smarty for templates, PEAR to access the database, and renders valid XHTML. Multiple languages are supported. A permission system can be used over all the features.

coWiki web collaboration tool

coWiki is a sophisticated but easy-to-use Web collaboration tool that helps you and your coworkers create and organize Web documents, Weblogs, and knowledgebases (or any other document structures) directly in HTML browsers. coWiki follows the tradition of loose Wiki Wiki Webs with easy and intuitional markup, adding Unixlike access management, a directory/document hierarchy, and a plugin API for your functionalities and enhancements. It is template-based and multilingual.

Text_Wiki

Text_Wiki is a PEAR class for parsing wiki text. You can drop it into your own applications and get wiki parsing right away. Text_Wiki is extensible; you can write your own parsing rules and macros.

ErfurtWiki

ErfurtWiki is a small Wiki engine implemented in PHP which stores its pages in a MySQL database or via a flat file backend. The Wiki source parsing is rather complete but is very extensible. It stands out from other Wikis in that it does not define the whole page layout itself; instead it allows for very quick integration into an existing Web site. The whole 'library' is fully contained in one script file. Additionally, it can cache referenced images. The simplicity of the image uploading function makes it also a good choice as lite CMS for private homepages.

Yawiki

A wiki application specifically for documentation building. Uses Text_Wiki so it can convert from wiki to any other format (XHTML for now; RTF, DocBook, and others are planned). Multiple sub-wikis (areas), access control list, anonymous and authenticated users, hierarchical mapping, built-in comment system, and more.

DokuWiki

DokuWiki is a standards-compliant, simple-to-use Wiki mainly aimed at creating documentation of any kind. It is targeted at developer teams, workgroups, and small companies. It has a simple but powerful syntax which makes sure the datafiles remain readable outside the Wiki, and eases the creation of structured texts. All data is stored in plain text files, so no database is needed

WebLime

WebLime is a mix of Wiki and CMS. It uses Smarty as template engine and TinyMCE as WYSIWYG Editor.