WowAce

NabuFiveSec

Swiss Army knife for instances, including player tracking, ignore buttons, loot tracking, notes, and more.

Puts a timer in /yell when you get Unbound Plague during the Heroic Professor Putricide encounter

Make noise when the servr is going to restart

MonkeyPirate

Warns you with sounds when you gain different shaman spells.

RainbowEnchants

Paints your known blueprints red.

FuBar_ItemDBFu

Adds an Atlas button to FuBar.

FuBar_RaidBuffFu

Display combo points for Arcane Blast debuffs

Provides training reminders to help decipher the Blizzard Spell Alerts.

Quickly assign the highest follower to each building or unassign all of them.

StitchUI

EnvenomX

iTargetingFrames

A seperate focus bar, with focus gain prediction and rotation forecast.

Right-click on minimap blips to open a targeting menu (out of combat).

lern2count adds ABinfo castcounts to spell and actions. It has a builtin reagentcount too.