WowAce

On login, displays changes to your guild since the last time you logged in.

Shows a frame to track your debuff on Malygos in phase three.

Enables cooldown notification between players and allows party members access to each-others spell books.

LibBabble-Spell-3.0

Tracks SendAddonMessage Spam

DynRepBar

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

FuBar_OmenFu

Database of your death locations for HandyNotes

Flames anyone who lets his debuff expire on Malygos Phase 3

Show optimal path for artifact leveling

GPriceEach

A Data Broker plugin to show AddOn memory usage.

TwiCo

InventoryLib

Small addon to copy chat lines.

FuBar_RicoXPFu

BankItemsFu

WhisperBid

Never forget which one in that 5-mob pull casts what spell again.