The Similar Blog

Marketing experts will often tell you that the next step in online selling will be selling experience instead of actual product. Today, one of the biggest sites that do it is WOW, World of Warcraft.

Wikipedia tells us about WOW: “World of Warcraft, often referred to as WoW, is a massively multiplayer online role-playing game (MMORPG) by Blizzard Entertainment. It is the fourth released game set in the fantasy Warcraft universe, which was first introduced by Warcraft: Orcs & Humans in 1994. World of Warcraft takes place within the Warcraft world of Azeroth, approximately four years after the events at the conclusion of Blizzard’s previous Warcraft release, Warcraft III: The Frozen Throne. Blizzard Entertainment announced World of Warcraft on September 2, 2001. The game was released on November 23, 2004, on the 10th anniversary of the Warcraft franchise.”
From Wikipedia: http://en.wikipedia.org/wiki/World_of_Warcraft

WOW brought a major success. Not only that it holds over 60% of the massively multiplayer online role-playing games, WOW has more than 10 million monthly subscribes.
Although WOW has no close competitor, here is a list for several Similar Sites to WOW
The list also include more pages of Blizzard Entertainment and several features for WOW.