WowAce

BossWhisperer

Adds aura indicators to unit frames

Display an arrow that points to a raid/party member anchored to raid frames

SQL-driven database system for Lua

FuBar_IOPFu

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

Swap a random tabard every time you visit the bank if you are wearing one

A FPS Data Broker plugin.

TableInspector

TickTo

Fancy up the ExtraActionButton frame

CatPoints

SacredBuff_Mounts

Dynamically atering layout in raid environment (Tanks, Ranged / Melee DPS, Healers)

Eliminates the spam from the chatframe and sums it up in a broker plugin.

Provides training reminders to help decipher the Blizzard Spell Alerts.

Upcoming events.

Allows for gold tracking across multiple time frames

Options for TinyTip

DebuffEnough