WowAce

Tracks vulnerability debuffs on multiple mobs

EBB adds groups of bars to your screen showing you which (de)buffs currently affect your toon or some other units.

Tracks the HoTs you cast.

A simple combat log that displays events similar to SCT

Reports in raid chat whenever a raid member "fails." /EnsidiaFails to configure.

Show buffs on nameplates.

Keeps track of HoTs, DoTs, Buffs and Cooldowns. With audio and text alerts to refresh them.

Shows simple Buttons for your Cooldowns :)

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

Checks your gear before bosses and yells at you if you're an idiot

Configurable Castbars

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

Shows Status Bars that you can drag around and group up for your cooldowns

Visualises healing.

Displays the remaing cooldown of the action you tried to use

Target Debuff monitor. Stacking aware, giving current and potential debuff status.

FuBar_VampwatchFu

CombatLog in SimpleCombatlog style

Keeps track of your top hits, heals, criticals, etc.

Makes a sound when your focus starts casting. Use with [target=focus] macros for interrupts (Counterspell, Spell Lock, Wind ...