WowAce

MoBuffs

Allows combined aura detection. motw + gotw, all 4 mage int buffs, etc. in one status.

Bars showing amount of buffstacks

Spell overlay customization and spell state HUD.

A frame with a text that gives you the amount absorb left on target, or in TankMode absorbs left on yourself.

Calculates incoming damage avoidance and mitigation

Provides extended aura status settings.

DebuffEnough

Audible Alerts for self-gain, self-lost, any-gain, all-lost of statuses.

EBB-inspired buff bars with click-to-remove support

Adds aura indicators to unit frames

Shows a countdown bar for the duration of auras (e.g. HoTs, DoTs)

SalvationKiller

Assistance for the Ra-den encounter. (Unstable Vita order, ball kill order)

Provides training reminders to help decipher the Blizzard Spell Alerts.

oUF element for highlighting debuffs that are dispellable by the player

A raid buff tracker

Keeps track of important de-/buffs in a splash screen

Adds Buff/Debuff icons to the grid frame.

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