User blog comment:Kirkburn/Rich text editor overhaul launches sitewide/@comment-1986883-20100602155709

Actually this editor's at mw:Extension:FCKeditor (Official) or http://mediawiki.fckeditor.net/ but Wikia uses a newer version than that of FCKeditor (now renamed CKeditor) that's customized for this site. mw:Extension:Wikiwyg is old, abandoned, and not in use. Personally I'm not a fan of the Rich Text Editor (rather buggy currently, causing minor edits by new users to ruin formatting and template usage) but maybe they'll fix it up in future versions. As for switching it off, besides clicking "source" in the top right hand corner, you can go to your preferences to disable it for you personally, you can use a "magic word" called __NOWYSIWYG__ to disable it on a specific page for everyone, or you can go to Special:Contact if you are an admin of a wiki and want it disabled for your entire wiki, or for certain namespaces of the wiki.