1. Wiki Software
This is software that allows users to create, edit and link web pages easily. It is often used to create collaborative websites and to power community sites.
The following Wiki Software versions are available:
* TikiWiki Software

TikiWiki Software is open-source, allowing for portals to be created on the internet, and on intranets and extranets. It has many options and sections that you can enable or disenable as you need.
It was designed to be an international, clean and extensible Content Management System and Groupware that can be used to create all sorts of web applications, sites, portals, intranets and extranets. It also works great as a web-based collaborative tool.
It is a customizable, modular, multi-feature package, which extends customization to the user with selectable skins and themes. Its features include: wiki; news articles; blogs; polls; forums; trackers; image and file galleries; and much more, in a tightly bundled system.
You can easily customize a Tiki site to make it your own. Tiki’s site Identity and Theme Control features make customization easy.
* PhpWiki Software
PhpWiki is a Wiki software written in PHP. It is essentially a WikiWikiWeb clone in PHP format. A WikiWikiWeb is a site where anyone can edit the pages through an HTML form. Features of PhpWiki include: multiple storage backends; dynamic hyperlinking; themeable and scriptable by plugins; full authentication; and ACL’s.