Wiki

"A wiki (IPA: &lt;WICK-ee&gt; or  &lt;WEE-kee&gt; ) is a type of  that allows users to easily add, remove, or otherwise edit and change some available content." – from Wikipedia, August 17th, 2006

Wowpedia is a wiki website.

Any website based on any kind of wiki software (such as MediaWiki, which Wowpedia uses) which enables users to add to, edit, and delete from the site's content quickly is commonly referred to as a "wiki".

List
This is a list of some of the many Warcraft and Blizzard-related wikis.

Warcraft

 * Wowpedia - Russian
 * Wowpedia - Spanish
 * WoWRP
 * Einsteigerwissen - German WoW Wiki
 * WoW-Wiki.net - German
 * GoblinExplosives Networks Wiki - Quite heavily lore orientated Wiki about WoW in Finnish
 * Rolcraft Wiki - Spanish wiki of the Lore of Warcraft.
 * CWDG Wiki - Simplified Chinese WoW wiki. Site includes WoW's API, XML and Lua documentation, player forums and UI/addons.
 * Raiding the Metagame Wiki on AJS.COM - English Warcraft mechanics and news Wiki
 * wowlib.ru - Russian
 * DotAWiki - Defense of the Ancients official wiki

Starcraft

 * Starcraft: IncGamers Wiki - English

WoW specifics

 * WoWWiki BR - Wiki about WoW in Portuguese
 * Allakhazam's Magical Realm - The first MMORPG fansite database has a wiki

Classes

 * Druid Wiki - Guides, gear, game mechanics and other info
 * Shadowpriest Wiki - Wiki for Shadowpriests
 * Warlock Wiki - Guide, gear, game mechanics and other info

Realms

 * Sentinels Wiki (Sentinels US)
 * SWC_US RP Community Wiki (Steamwheedle Cartel US)
 * sporeggar.info (Sporeggar Europe)
 * cenarioncircle.pbwiki.com (Cenarion Circle US)