GuildWars 2 – The official GW2 website, find Forums, details about living story, support and shop for both in games items and the game itself!
Dulfy.net -Guild Missions guide, Patch updates, Living Story Features, class guides, list of armor and weapon skins achievement guides and more! Dulfy.net Boss Timer
GW2DB -This is great for crafting resources, the ultimate list of crafting recipes. They also have other guides.
GuildWars 2 Wiki– For all your GW2 needs! This is the ultimate GW2 resource, typically your best bet!
GuildWars 2 Spidy– This is the best for finding out and comparing prices in the Black Lion Trading Company, can be used for crafting as well.