WowAce

Allows you to browse your clients database

FuBar_AmmoFu

Inventory and bank organizer.

Allows you to loot BoP items without prompting when not in a group or raid

Outdated! Please use 'XLoot', available on Curse and WoWI

ColaLight

Helps to track outgoing mails

A library to get currencies' related information

Makes your item stats shine!

ItemValue

Allow rule based automatic rolling on loot.

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

Considers an item against all the items you have to determine whether or not it is an upgrade

GearRating

Adds item values to chat messages.

WhisperBid

A tool to appraise, estimate, or judge your equipment against the equipment of others.

ClosetGnome_Banker

Gives equipped and overall iLvl to indicate the quality of a character's gear.

Displays info about who rolled Need/Greed/Pass on items that are currently rolled for