MediaWiki is a free application, registered under the GNU General Public License (GPL). It is used to run Wikipedia, the World's largest online encyclopedia, as well as many other wikis. Mediawiki provides a rich set of features and sometimes this complexity might puzzle you a bit. Mediawiki is the most popular wiki software and there are lots of extra resources built for it.

You can learn more about MediaWiki from our great tutorials and from the MediWiki's official website.