WowAce

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

Displays both Kalecgos and Sathrovarr the Corruptor hit points during the encounter.

Rep2 displays a message, which shows how much reputation you gained, and how much is needed until the next standing.

Keep your pet fed

FuBar_UIReloadFu

Meeuuuh

Persists collapsed state of headers across wow sessions.

Show a bar indicating the unit's Holy Power count.

Small Box Icon Pack for Cartographer

FuBar_TinyTipFu

Watch tooltip updates to announce when you find specific objects

Keeps track of important de-/buffs in a splash screen

FelwoodFarmer

PoisonSwapper automatically manages weapon swapping for maximum DPS

Show a texture on demand

Compact scrolling vendor frame

CrayonLib

FuBar_GCInFu

NShakedown

Display combo points for Arcane Blast debuffs