WowAce

Role playing AddOn that shows extra information about characters as entered by the player.

ItemBonusLib

Helps you automate selling stuff

Adds achievement reminders to BigWigs

An addon to assist with organizing healing in a raid set up.

Rebuff yourself with the mousewheel.

Adds party/raid role icons in useful places

MainAssist

Incoming Heals

Mutes various chat related annoyances while in capital cities and instances.

Open all your mail

Simple quest item bar.

Co-ordinated targetless Party and Raid wipe recovery. Evolved

Searches bags/banks of all your characters/guilds.

Incubator

Displays reagent count on spell action buttons

Personal buff monitor - are you buff enough?

Shows the mirco menu and game menu in a clickable broker tooltip.

Heads-up minimap display

Auto roll greed, need, pass or manually roll on items.