Blizzard shrewdly allow, and even help third parties with, addons to the extent of supplying a kit.
We downloaded the QuestHelper addon from curse.com yesterday.
QuestHelper tells you how to finish your quests in the easiest, fastest manner. It includes a database of quests, monsters, and items, telling you the exact location of that dang Perfect Satyr Horn you can't find. It also computes the fastest path to complete all your quests - and gain experience - as quickly as possible.Whatever floats your boat, I guess. QuestHelper has been downloaded over 20 million times. It's Ben's world, I just live in it.