WowAce

Blocks Chinese Chat

Saves and restores your action bars.

Centralised management hub for small tweak, interface and utility addons.

Library to help with querying unit talents.

Displays a reliable cooldown timer for the Shaman Ascendance ability

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

Swap a random tabard every time you visit the bank if you are wearing one

Display an arrow that points to a raid/party member anchored to raid frames

Adds Friend and Guild options to the context menu of player units.

FuBar_ModMenuTuFu

KC_PlayerFramePlus

BagSync

ElfReloaded

UnitActionBars2

Database of Mailbox locations for HandyNotes

Makes tracking reputation much simpler. By InSo(v)nIaX

Quest helping: fetching items to use, that sort of thing.

TrapBar

Provides LibPeriodicTable-3.1 item filters for AdiBags.

Adds tier set number and difficulty indicators to tier item tooltips.