WowAce

Save and send chat messages to many channels. Allows quick item and profession linking within your messages.

KeyProfiler

oUF layout looking like ag_Unitframes and Grid.

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

Adds aggro coloring to oUF.

Adds information to Titan Panel about your Professions and opens ProfessionsBook

Overlays Archaology digsite icons on the flightmap

Adds resurrection, resurrected and soulstone status to Grid2. Uses LibResComm-1.0

Good looking, smoothy and helpful nameplates

Broker add-on for GemHelper

Automatically and immediately cancels all in-game cinematics and movies

CleanShot

A library to provide a way to easily create controls for Blizzard's options system

LDB addon to manage your addons

Out of Mana bar.

Compact scrolling vendor frame

A frame with a text that gives you the amount absorb left on target, or in TankMode absorbs left on yourself.

Interface for addons to include extra information on the GuildMemberInfo frame.

Automagically call who should cross over

BetterOutbox