WowAce

When a new icon ("vignette") shows up on the minimap, shout about it

LibCustomAchievement-1.0

Warns if anyone has taken too much damage to cause the Orb Whisperer achievement to fail.

Suppresses guild reputation cap spam when turning in quests.

Checks on entering combat whether or not the entire raid has only blue gear equipped

A library that provides a way to get server-side random values.

MacroMagic saves space in your addons by consolidating a common set of commands into a single shortcut.

Says if anyone got too many stacks of Inoculated.

Counts how many Swarm Scarabs that are alive in the Anub'arak encounter

Make health bars based on 10k health when unit has Finkle's Mixture.

A library for sending addon messages over the battle.net chat system

Waypoints for Pandaria Treasures

"This addon will update your macros to always point at your tank"

ScrubbingUI

Templar is the ultimate Mage Assistant

Runs guild pool-fishing contests

AWbags

Let everyone know how much fail they are

oUF module providing LIbScriptable text widgets for layout use.

Polaroide