WowAce

Improvements to the standard Blizzard Eclipse bar for balance druids. Use /ebp for the config screen.

Adds aura indicators to unit frames

A library that tells wether a item is a quest item or not (equipped or in bags)

TickTo

Customize the appearance of the chat bubbles.

Shows the minimum durability of equipped items on the stats frame.

Bars showing amount of buffstacks

BossWhisperer

vChat

Manages the scanning of the auction house in a reliable an efficient manner.

DelMapa

Deformat

JostleLib

Show optimal path for artifact leveling

A boss encounter engine used by other add-ons

Provides the the health and target of by an unit targeted mob (meant to be used for tanks).

AutoFIR

Communicates with guild members for their positions on the world map

Constructs a SimC export string for an item without equipping it

Saves who searches in a favorites list.