UseModWiki

UseModWiki is a wiki engine written in Perl. It was used by Wikipedia before it switched to MediaWiki.

History
After Ward Cunningham created the first wiki, WikiWikiWeb, there were various clones of it, mainly written in Perl, that implemented the functions and design of WikiWikiWeb's engine. One of these clones, AtisWiki, was the base for UseModWiki.

In the 1990s, Clifford Adams started a project named Usenet Moderation that would allow users to change information about Usenet posts. In 1999, it was replaced by the concept of wikis, and the development of UseModWiki started on October 11 as a simplified fork of AtisWiki. From version 0.4 ("WikiFour") in November 1999, more functions and improvements were introduced to UseModWiki. In 2000, the second UseModWiki website, MeatballWiki, was launched and hosted on usemod.com, along with the official website of UseModWiki.

In 2001, Adams brought many improvements for encyclopedias in v0.91 and v0.92. Perhaps the most important feature is "free links", which use double square-brackets (e.g., ) and can be used instead of camel case for page linking. In September 2003, after two years of development, the release of version 1.0 introduced many new features, including CSS, RSS, file uploads, UTF-8, and more. Only bug fixing versions have been released since then, and Markus Lude took over the project of UseModWiki from Adams in July 2007. The latest version was released in December 2017.