WowAce

AspectsBar

Bind spells, items, and macros to keys, without using action buttons

Disease Tracker for Death Knights.

Note + rep tracking for players, with guild data sharing.

Keeps track of durability and pops up a dialog to repair when you go to a vendor who can.

eePanels

Calculates incoming damage avoidance and mitigation

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

Prompts for canceling of pet battles if no rare pet is found in the opposing team.

Allows you to browse your clients database

IncomingHealsLib

Rewrite myBindings. An enhanced key bindings interface.

In-game EPGP guild helper, supports standby, main/alt shared pools, minEP, offpecGP. Fixed price list with progress multiplier.

Simplifies GDKP bidding processes

AceBuffGroups

Visual loot monitor

FuBar_RecZone

RicoMiniMap

Tracks interrupts

Library to help with querying unit talents.