Editthis.info is a wiki hosting site, or wiki farm, similar to Wikia. It was founded in 2005 by Rob Kohr, who manages several different websites. It is currently overrun with spam and vandalism, with around twenty thousand unnecessary pages.
Editthis.info has many similarities and differences to Wikia. On Wikia, even though you administer your site, Wikia owns it. On Editthis.info, users own their sites, and they have a control panel where they can make their site private, or disable account creation, etc. Editthis.info uses MediaWiki, just like Wikia.