WowAce

Displays the locations of Lunar Festival elders.

Provides one or many informational windows with optional interactive widgets.

Libra

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

Marks the locations of Midsummer Fire Festival bonfires on the worldmap and minimap.

LibItemInfo-1.0

Queing of /who and SendWho() queries and a much better interface (see docs), with gurantee to be executed & callback.

Show the appearance of an item when you mouse over it

Data Broker Display similar to FuBar

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

Database of Diminishing return categories and general data

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

Find five Ephemeral Crystals, get a pink hippogryph

Show buffs on nameplates.

Set and manage character notes that are displayed in unit tooltips and /who results.

Adds mob patrol paths to your map.

Where the lore is at

Cleans up minimap buttons and makes them accessible through a pop out menu!

Drop the cheapest thing you're carrying

Display Cooldown Count of Spell Icon and Item