WowAce

The original source for where things are in Pandaria

Data Broker Display similar to FuBar

Show item levels in the character frame

Remember locations that city guards direct you to for HandyNotes

Display Cooldown Count of Spell Icon and Item

Enables multi-line/unlimited-length pasting of text or commands into WoW

Max Camera

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

HideTalkingHead

Afflictions display and cleaning for solo, group and raid with advanced filtering and priority system.

Blocks Chinese Chat

Mutes various chat related annoyances while in capital cities and instances.

A blizzard group finder replacement

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

XP bar using Ace3.

Custom widgets for AceGUI-3.0 and AceConfigDialog-3.0.

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

Displays additional information for Mythic Keystone dungeons

Library of data about what items tier tokens can be turned in for

Watches your chat, flagging missplled words, and offering correctly spelled suggestions.