WowAce

Printing unknown AddonPrefixes to your chat

Makes keyboard bindings for moving the camera

Shows the source of an item as a tooltip

aUF_Banzai

Show a five second rule on the player frame in SUF

Applies LibKeyBound to Spell Book and Macro UI Buttons.

Displays a table for possible outcomes of incoming hits with their probability

Medley

Expiration

shows keystones from your alts, guild members and friends

Creates an Auctionator's shopping list with all recipes your alts need based on Altoholic data.

DKPmon

Pick Pocket Countdown Timer for Rogues.

PackageTooltip

Show a bar indicating the unit's power that can change color based on value.

Tells your party members when you interrupt stuff, or fail to do so.

LDB data source for Instance Tracking

Addon to add macro support for setting and clearing raid icons

RBM_Hyjal

MarkMyTarget