DrDamage
In-game theorycraft. Calculates actual damage/healing based on gear, talents and buffs.
Cataclysm 
Mists of Pandaria 
The Burning Crusade 
Wrath of the Lich King Addon Details
Expansion
Developers
Having issues?
DrDamage displays the calculated, average damage or healing of abilities with talents, gear and buffs included on your actionbar buttons. The addon will also add various information to the default tooltips in your spellbook and on the actionbar.
Download DrDamage
Cataclysm
4.3.4
More addons for Cataclysm
Discover other addons that might interest you
Outfitter
Clothing and weapon management and automated equipment changes.
Decursive
Afflictions display and cleaning for solo, group and raids with advanced filtering.
Prat
Prat is a framework for chat ehancement modules.
Grid
A modular, lightweight, and screen-estate saving grid of party/raid unit frames.
EasyLoot
An automatic loot filter.
AutoRepair
Automaticaly repairs all items when a merchant window is opened.
TSM
Backported version of Trade Skill Master (TSM).
Fishing Buddy
Help with fishing related tasks -- clothing, fish information, etc.