WowAce

Auto sizes frame layout depending on group/raid size or predefined zone data

Adds options to create customized layouts from within grid.

Track any items you want in a tooltip

SmartyCatManaBar

Ignore more than 49 people, autoshared between your alts

Battleground Timers in a HUD around the Blizzard BG status

lugMD

Lag tolerance module for Broker displays.

GUI Configuration Library

GrindStatus

Add-on that shows which battle pets can be farmed this week

A menu with useful searches for Inventorian

Avion

HazLoot

A fully featured library tracking all ongoing absorb effects

SacredBuff

Persists collapsed state of headers across wow sessions.

Aspect checker addon for Hunters.

Simple, light-weight, LDB-enabled timer that tracks how long you spend in combat

Cryolysis 3