WowAce

Shows the group leader, raid assistants, and master looter in Grid.

iTargetingFrames

Adds a Friendly Fire mode and data collection to Skada.

Converts incoming ALL CAPS CHAT into lowercase text.

Interface-central mount management

Lute

Makes the Blizzard options frame movable and resizable

Klappa

Keeps a list of all items you want and shows how much you need.

Hunter 'Misdirection' activity and cooldown monitoring for raids/groups. 'Readiness' aware.

Show an in combat indicator

Shows missing buffs and handles welfare and deluxe buffs as one (motw/gotw, blessings, etc.). This lets you see when you nee...

Animated target indicator

Good looking, smoothy and helpful nameplates

Show a bar indicating the attack power gained from Vengeance.

ClosetGnome_Banker

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

Social tracking suite.

GratuityLib

XML import library