WowAce

Parses ToC and adds About panel to Interface options

Makes the Blizzard options frame movable and resizable

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

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

Displays the locations of Lunar Festival elders.

Tracks herbs/ore/items that can be broken into component pieces

One large inventory.

Database of Diminishing return categories and general data

Adds mob patrol paths to your map.

Shows you a much bigger icon selection frame

Data Broker Display similar to FuBar

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

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

Displays the locations of the chests for the Treasure, Treasure Everywhere achievement

A display for LibDataBroker-1.1

Show buffs on nameplates.

Floating Combat Text of awesomeness. Caw. It'll eat your crackers.

Creates simple table controls for tabular text data.

Textures for Stop Motion

Auto repair + shows durability.