WowAce

Target assistance by automatic rewriting of macros

Omniscience

It's a doodle pad for doodling with doodles.

KC_PlayerFramePlus

Make your whole party/raid aware of whats happening during and after a readycheck

GirlFriend

Sneakily inspect how much gold your mouseover target has made so far.

Make noise when the servr is going to restart

MouseLook

PetBar

Meeuuuh

Combat log replacement

Bag and item management utilities

A Raid DPS Data Broker plugin.

Nudge

ClosetGnome_Switcher

A system config addon to WOW

Reslack

ImprovedTargetFrame

RapidCast