WowAce

Artifact power bar support for oUF layouts

Simple font replacement

PvP plugin for any DataBroker display.

Automatically accepts and turns in the Holiday "fly around the world" quests.

Provides bang-whispers for your professions.

RapidCast

Resizes Blizzard raid frames, and adds additional options.

Colors friends/bg score board/who list names by class color

Send Mail to Groups

Denial2

FuBar_GemWatchFu

Simple Bars for your Shaman's weapon buffs and shield spells.

A collection management library similar to .NET's System.Linq

SmartyCat

Automatically restock items from vendors and your bank

InventoryLib

Durability Data Broker plugin.

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

A standalone version of Angry Assignments to create and display personal notes on your screen.

ShammySpy