What are some good add-ons for a warrior in World of Warcraft

Warriors of all kinds require few addons to be successful. For Arms and Protection warriors, an addon showing debuffs on your target can be useful to maximize Rend uptime, gauge how long Demoralizing Shout still lasts, and so on.

Good addons of this kind include ForteXorcist, Ellipsis or Dotimer. The addon Power Auras can also be set up for all manner of alerts, but requires a bit more setup.

When you are raiding, a Boss Mod of some kind, which helps in avoiding danger and alerts of boss abilities, is a great help. Good examples are Deadly Bossmods (DBM) or Deus Vox Encounters (DXE).