WowAce

Broker launcher plugin for Recount

Tracks interrupts

iTargetingFrames

Good looking, smoothy and helpful nameplates

Displays reagent count on spell action buttons

autoLFG

CraftList

NextStep

A noble spirit embiggens the smallest player arrow.

Add-on that shows which battle pets can be farmed this week

Opens professions and shows their skill level.

Allows custom-triggered boss mod timers to be created

TwiCo

JostleLib

Shows at-a-glance what raid buffs/debuffs you have.

Zone text Data Broker plugin.

Adds a Friendly Fire mode and data collection to Skada.

Sets you to DND when you fight a boss, and some other crap.

Make your whole party/raid aware of whats happening during and after a readycheck

MaxStats