WowAce

One large inventory.

Marks the locations of Hallow's End candy buckets on the worldmap and minimap.

Provides access to all Portal and Teleport spells on right click of one button.

Displays the locations of Lunar Festival elders.

Max Camera

Show the appearance of an item when you mouse over it

Tracks the Blood Shield for Death Knights.

Timers for Buffs, DOTs, CC effects, etc..

EBB adds groups of bars to your screen showing you which (de)buffs currently affect your toon or some other units.

Gears skins for Masque.

Show buffs on nameplates.

Where the lore is at

Find five Ephemeral Crystals, get a pink hippogryph

In-game theorycraft. Calculates actual damage/healing based on gear, talents and buffs.

Provides one or many informational windows with optional interactive widgets.

Adds mob patrol paths to your map.

Display Cooldown Count of Spell Icon and Item

A library to provide information about zones and instances.

Smooth combat HUD based on ArcHUD2

Data Broker Display similar to FuBar