WowAce

Helps to track outgoing mails

Show a rough range indicator

Skip the gossip and select the normal NPC action

Keeps track of people who have recently sent you messages.

Adds Buff/Debuff icons to the grid frame.

A boss encounter engine used by other add-ons

BagSync

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.

LibDebugLog-1.0

FuBar_FromAViewToAKillFu

EBB-inspired buff bars with click-to-remove support

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

FuBar_KCIFu

PlayerNotes

Persists collapsed state of headers across wow sessions.

Add-on that shows in a unit tooltip window a number of killed mobs of the same kind

Unit testing framework for World of Warcraft addon development.

Adds unreal tournament style sounds to PvP encounters.

Automatically and immediately cancels all in-game cinematics and movies