WowAce

A Healing Assignment management addon

Light-weight enhanced casting bars

Adds an additional spell alert if you have more than one charge of a buff that is normally tracked by the in game spell alert...

Enables the setup of the Shaman "Call of" spells

Skin buffs with Masque

Enigma

Really very early stage. No, earlier than that.

Display who did the Worship interrupting on Chogall

Loooooot!

Automatically switches Profiles of addons when changing spec

Joins the LFG channel automatically.

Addon management panel extreme release edition

Remaining and rested XP Data Broker plugin.

Try to keep them thar pets wrangled

LDB display of the players current damage percent modifier

Adds a simple percentage threat status to Grid.

CraftBot

Shows the spec of people around you in the tooltip.

Scaffold

oUF_HolySmurf