WowAce

Quest information

Tankalyze

Cartographer_Mailboxes

Draws some lovely 3D portraits in the standard Blizzard artwork.

ImprovedTargetFrame

Show a texture on demand

Quickly assign the highest follower to each building or unassign all of them.

Piece of mind by being one with your class.

Automatically sells low quality gray items and selected white items to the vendor.

MendWatch

Shows skills in a tooltip and allow them to be used. Also keeps track of Cooldowns.

FuBar_TinyTipFu

Add in keybindings to place raid marks on mouseover, or the target if there is no unit being moused over

Shows who controls Wintergrasp and the time until the next battle.

Handles the assignment, coordination, and announcement of many parts of the Lich King encounter in Icecrown Citadel.

T_ItemInfo

opens/closes all bags when at merchant (instead of only the backpack)

Shows you which bosses you've killed next to the raid finder frame.

A Data Broker add-on for quickly switching your specialization with gear set and loot specialization.

Add a line to herb tooltips that shows what pigment they produce.