WowAce

Simple Map Mod

Where the Treasure Hunter objects and rares are in Draenor

Tracks Raid/Instance/World Boss lockouts for all your characters, daily/weekly quests, currencies, trade cooldowns, and more!

A modular, lightweight and screen-estate saving grid of party/raid unit frames

Library that handles chat output.

Replacement for ActionButton_Show/HideOverlayGlow APIs

A skinning engine for button-based add-ons.

An intuitive keybindings library.

Creates and manages secure Action Buttons

Where things are in Pandaria

Timer bars with that extra sweetness.

A framework for chat ehancement modules.

Shows the possible loot from the bosses

Makes the default frames moveable via simple drag and drop

Show item levels in the character frame

Arena unit frames

Does stuff for sachmo

Allows you to view all items from all your characters on the same account, when-ever and where-ever you want.

Library to check whether an item is equipable / appropriate for a given class

Replacement for the default UI's StaticPopup dialogs.