WowAce

Replacement for the default nameplates.

View party member quest logs

Provides extended aura status settings.

Automatically invites player from templates.

Provides information about the player's bodyguard.

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

Allows combined aura detection. motw + gotw, all 4 mage int buffs, etc. in one status.

Provides the the health and target of by an unit targeted mob (meant to be used for tanks).

Dropin replacement library for SetBackDrop

Omniscience

Save and send chat messages to many channels. Allows quick item and profession linking within your messages.

HealComm-2.0

Adds a confirmation dialog when crafting Bind-On-Pickup trade skill items

Lists and/or reminds people missing flasks or food buffs at every ready check.

Interface-central mount management

Armored man and paper doll durability modifier

Adds indicators to the sides of Grid frames.

Group interrupt cooldown tracking.

Parkour puzzles throughout the world.

Dailies Quest Tracker