WowAce

Numerical and graphical display of Combo Points and similar buffs/debuffs. Also tracks Holy Power and Soul Shards.

Alternate Power- and Combopoint/SoulShard/HolyPower-bar

Displays reagent count on spell action buttons

Track all threat redirection ability transfers and cooldowns (Misdirection and Tricks of the Trade).

Simple, nice-looking power bar addon for all classes.

Hemlock

A collection of Rogue modules.

PowerBar

Holy Power, Shadow Orbs, Rogue Combo Points and Monk Chi.

Melee stats Data Broker plugin.

TrickOrTreat

LD50_abar

Comergy 2

Open those pesky lockboxes

PoisonSwapper automatically manages weapon swapping for maximum DPS

Highlights the action bar spells that need to be kept on target or player

Outlaw Rogues are Combat Rogues once again.

GonffBar

PoisonMenu

NinjaPoints