WowAce

Shows a money overview for your current realm in the tooltip on the money in your bags

ag_Pimpster

Shows the duration of the most recent (or current) combat

Action button layout and configuration

ReforgeSummary

DynRepBar

RapidCast

A shaman mod

Provides buttons and keybinds for raid flare world markers that never stop working mid-session

Adds an additional spell alert if you have more than one charge of a buff that is normally tracked by the in game spell alert...

Makes the message dialog movable

ClosetGnome_Banker

oUF layout looking like ag_Unitframes and Grid.

A simple addon that warns you if your pet isn't attacking while you're in combat.

Fudge

An attempt at giving a complete overview of Arena battles

A data broker plugin showing your longest fight and your current fight time.

Protractor

Creates parameterized AceGUI-3.0 editboxes with autocompletion

A library that tells wether a item is a quest item or not (equipped or in bags)