WowAce

Combine

Toolset for tanks, providing information on taunts and other valuable information.

Does a /who search of multiple dungeons.

MultiTips

Swap a random tabard every time you visit the bank if you are wearing one

Sneakily inspect how much gold your mouseover target has made so far.

FuBar_KillMeterFu

Adds Buff/Debuff icons to the grid frame.

Instant PROC notification

InstanceMaps

Generate a macro with random mounts

Saves contents of your guild bank and sends/receives updates over the addon channel

Shows you which bosses you've killed next to the raid finder frame.

Adds tier set number and difficulty indicators to tier item tooltips.

Keeps tracks of /rolls.

Dedicated to Lazybones of EU Khadgar who had the original idea as he can't find a damn thing in his bags. You're a great guy...

SanityItemCache

Handles the assignment, coordination, and announcement of many parts of the Lich King encounter in Icecrown Citadel.

Enables you to see Chinese, Japanese and other languages in game

Prospecting and Disenchanting Aide