WowAce

Library providing multi-column tooltips.

Modular casting bar.

Show item levels in the character frame

The original source for where things are in Pandaria

Officially the original source of knowledge of where things are in Draenor during Warlords, in HandyNotes

Modular damage meter.

Arena unit frames

Collects Herbs, Mines, Gas Clouds, Archaeology, Treasure and Fishing locations and adds them to the worldmap and minimap

Estimated range display. Type /rangedisplay for config

Simple Map Mod

An intuitive keybindings library.

"Debug" code free since '93!

Creates and manages secure Action Buttons

Replacement for ActionButton_Show/HideOverlayGlow APIs

Another HUD addon

Does stuff for sachmo

Adds a Button to the Worldmap which toggle Handynotes

Adirelle's bag addon.

In World of Warcraft healers have to die. This is a cruel truth that you're taught very early in the game. This add-on helps you influence this unfortunate destiny in a way or another depending on the healer's side...

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