WowAce

Automatically invites player from templates.

FuBar_ItemDBFu

Keeps track of durability and pops up a dialog to repair when you go to a vendor who can.

Capital Cities NPC Browser

A superior broker/LDB display for users of the Recount damage-meter.

LDB data source for Combat Tracking

Add-on that shows which battle pets can be farmed this week

A filter tool for blizzards TradeSkillUI

Loot Distribution System

LilSparky's Workshop mod for Trade Skills

ItemPriceTooltip

Shows your standings with the factions.

Bidder

Save and send chat messages to many channels. Allows quick item and profession linking within your messages.

Visual loot monitor

Displays an alert whenever you loot an item for the first time.

Display bag usage on each of your bag slots.

Client for allowing the raid leader to gauge interest on items in a method similar to a ready-check.

Separate indicator for your HoTs with timer.

Healer gear benchmark