World of Warcraft (commonly acronymed as WoW) is a massively multiplayer online role-playing game, which is Blizzard Entertainment's fourth released game set in the fantasy  Warcraft universe.The game of World of Warcraft or WoW is set in a fictional world known as Azeroth and later extending to a further world called Outland. Players can also participate in player versus player combat, either in large groups or small team matches. Now it is the most popular MMORPG in the game world. And the new expansion Wrath of the lich king also make the players crazy, they are eager to feel the new character and fuction in the WOTLK.

Over time, a number of additional features and improvements have been added to the game world, such as additional locations to explore. Moreover, other MMORPGs which are released such as warhammer, Aion, Atlantica Online, Lineage2, Darkfall, The Chronicles of Spellborn, Age of Conan, Lotro and so on attract the players to fullfill their in-game experience. Those companies had designed the games to allow players to customize their game interface through the use of modifications, also known as mods or add-ons.These mods can help  the player by automating simple tasks, grouping similar spells or abilities together and enhancing the way information about the game environment is presented to the player.