The place to go first if you’re having trouble with a quest, need to look up an item or need information about an event. Usually can find good info on rare spawns here too.
Another great place for information, blue tracker, talent calculator, database.
World of Warcraft Gear Optimizer, spec information and articles.
Wowjuju’s Reputation Calculator is great for reputation hunters. Let’s you know how to gain rep with factions and how much farther you have to go.
Look up your character, guild, check guild progress. Advice on enchants.
Pick a template for your class and look up where the best armor for you is available.
Another good gear-finder.
I could NOT have met Dormus the Camel Herder without this. Indispensable for rare spawn hunting.