Quartz is a unique casting bar addon, as it makes the casting bar more visible and easier to see. Personally, I have always loved Auction House addons that help set prices for me. As anyone knows from playing games on Steam, a video game is always plenty more fun with mods and addons in addition to the game itself. There are many different kinds of addons, varying from ones to aid with professions and others that aid in encounters.

In World of Warcraft, many players have downloaded a variety of addons, usually more than one, to aid them in the game.