WowAce

SanityBags

Plays amusing sounds whenever you skin a mob

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

Reports in the Default Chat Frame how many people does not have Well Fed effect, and who are they

FuBar_KungFu

Zone text Data Broker plugin.

Helps with interrupt notifications and announcements.

BankAccountant

A total number of quests Data Broker plugin.

A data broker plugin showing your longest fight and your current fight time.

LibDogTag-2.0

Debuff Monitor: A Powerful & Configurable Raiding Tool

FuBar_TraxieFu

Shows an arrow to your bite victim during the Blood-Queen Lana'thel encounter in Icecrown Citadel (your raid leader must be r...

Adds pipes which can control arbitary other statuses (like toggle status on key or "in combat"-state).

Send Mail to Groups

Creates a broker plugin for all your broker launchers

xchar

FuBar_SoulJarFu

Notifies you when you get aggro.