MediaWiki is an open source wiki application. MediaWiki was initially released in 2002 after being developed to power Wikipedia. MediaWiki is a feature-rich wiki implementation, and is used to power Wikipedia and many other wikis.

Features:

• Look and feel: MediaWiki's user interface is customizable through the use of skins.
• Keeping track of edits: With MediaWiki, it's easy to revert an entry to a previous state. MediaWiki keeps track of all edits.
• Structures and syntax: A full set of commands are supported which enable elements such as sortable tables to be embedded into entries.
• Spam and vandalism: Prevent link spamming, and other forms of abusive editing.
• Discussions: Each user (including every anonymous user) and every article has an associated page where messages can be posted.
• Permissions and user groups: Multiple user groups and editing permissions for each are supported.
• Search: Full search capabilities and numerous special report pages are available.
• Multimedia and extensions: Multimedia files can be uploaded and attached to wiki entries.