WowAce

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

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

Alternate Power- and Combopoint/SoulShard/HolyPower-bar

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

PowerBar

Displays reagent count on spell action buttons

Hemlock

A collection of Rogue modules.

TrickOrTreat

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

LD50_abar

PoisonSwapper automatically manages weapon swapping for maximum DPS

Comergy 2

Open those pesky lockboxes

Melee stats Data Broker plugin.

Cues for Rogue Rotation

EnvenomX

FuBar_NinjutFu

Envenomous

PoisonMenu