WowAce

Track any items you want in a tooltip

OneView

FuBar_TimerFu

InstanceMaps

Customize the PlayerPowerBarAlt display

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

Keeps tracks of /rolls.

A FPS Data Broker plugin.

Checklist and notes addon.

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

A seperate focus bar, with focus gain prediction and rotation forecast.

SmartQueue

BigTrouble

KeyProfiler

This addon helps with daily quests.

Adds a confirmation dialog when crafting Bind-On-Pickup trade skill items

Client for MagicDKP which handles standby calls and bidding on items.

InventoryLib

What did you just loot?

Hitman