WowAce

Scans your Equipment for cumulative item bonuses and sums them up.

Adds the toon name to the alert that your RealID friend has come online.

DataBroker display using minimap buttons.

For Developers (of Addons which uses LibWho-2.0): show queues and queries in realtime

adds navigation buttons to Encounter Journal

RoleCall allows you to easily see the talent specs and roles of everyone in your group.

DotDotDot

Visual loot monitor

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

AltClick an item in your bag to add it a mail, auction, or trade frame, and alt-click to buy a stack if reagents.

Replacement for default Rune Frame and more.

Prospecting and Disenchanting Aide

Fixes strata bugs in UI windows

Ace2'd version of the "Visor" frame-modifictaion AddOn. All code in this addon is copyrighted 2006 by its authors, which are...

Shows your standings with the factions.

LittleTrouble

Simple font replacement

Expo

A library to handle rearrangement of blizzard's frames when bars are added to the sides of the screen.

PoisonMenu