WowAce

Adds "line of sight" status to Grid (after the error occurs).

MarySue

Adds Yogg-Saron Sanity status to Grid.

Shows on the minimap where to fetch Finklestein's reagents

Tracks Prayer of Mending

Automatically calls ForecQuit() right before you are AFK-disconnected to quit wow instead of going to the character selection...

TickTo

Caser

A gnome sized calculator.

With Mists of Pandaria Blizzard publish all characters from an account unless you disable that 'feature'. This addon warns you.

RBM_BadgeWatch

Adds CSV output to Ouro Loot

BabiiSkulls

Prevents accidental target deselection while looting caused by deselecting the target

AEmotes

LibSpecialEvents-Aura-3.0

DKPmon_ZSumAuction

A database of poeple wo can craft your items

Shift-clicking on a user name in chat shows a tooltip with their whois information.

Dynamically creates your frames using a table structure and then operations can be done on your list frames