WowAce

A sexy logarithmic cooldown bar

MorgDKP

Necronomicon2

Allows you to preview weapon glow in Dressing Room.

Henge

Plays sound when a ready check, LFG queue, battleground queue, or world battleground queue pops even if you have sounds turne...

CandyBar style cooldown display

Show all the orbs for triggering Kosumoth

Keeps track of space left in your bags.

LDB display of currencies, gold totals and session / daily / weekly statistics for all characters on a server.

HUD that you can tweak the way you want.

Deathknight Rune Display

Configure triggers to send messages to your raid team such as timers, rotations, and health/power based triggers. Raid smarter not harder.

Says random things in chat when casting any spell or ability. Type "/ss help" for the user's manual.

An auction house AddOn to make the life of each fence easier.

QuestLog

Shows simple Buttons for your Cooldowns :)

Addon to provide a much nicer map

A data broker display, that shows one block per plugin.

Healer gear benchmark