WowAce

Scans your Equipment for cumulative item bonuses and sums them up.

Stores a browsable database of spells that mobs cast

Gathers statistics on certain chance-on-use spells, also known as procs.

DogChow

Keeps track of honor, PvP statistics, BG Marks, and Arena points.

Keeps track of time played and rested XP across your characters.

FuBar_VoiceFu

RaidAgent

ItemValue

ShadowGreenLight helps you decide if recasting SWP/Corruption is worthwhile

Tracks the precise arrival & departure schedules of boats and Zeppelins around Azeroth and displays them on the Mini-Map and ...

Privacy2

Volume control panel.

Note + rep tracking for players, with guild data sharing.

FuBar_ItemDBFu

Adds party/raid role icons in useful places

Review any raid or party members recent incoming combat along with health level.

SysMon plugin for any DataBroker display.

Displays the zone level ranage of the zone you are in and also gives you a suggest zone and instances to be in.

FuBar_FuXPFu