WowAce

Quickly builds /target macros for immediate use.

A FPS Data Broker plugin.

A helper addon for the achievements "Let It Snow", "Fistful of Love", "Shake Your Bunny-Maker", "Check Your Head", and "Turkey Lurkey"

Shows an arrow to your bite victim during the Blood-Queen Lana'thel encounter in Icecrown Citadel (your raid leader must be r...

Notifies you of new calendar event invites and reminds of upcoming events on all characters and realms

Improvements to the standard Blizzard Eclipse bar for balance druids. Use /ebp for the config screen.

Adds unreal tournament style sounds to PvP encounters.

Automagically draw your weapons !

Counts stacked lifeblooms and uses progressive colors to indicate the active number of HOTs.

PlayerNotes

A boss encounter engine used by other add-ons

Communicates with guild members for their positions on the world map

Adds 3 indicators to each side (top, bottom, left and right).

Broker2FuBar

Unit testing framework for World of Warcraft addon development.

eeMon

Keeps track of people who have recently sent you messages.

Show a rough range indicator

Spell interrupt aid and announcement addon.

Paparazzi