WowAce

Doublerightclick casting, autolure and sound enhancing

Tells you the Tiller, what food they like, and if you have fed them today for the quests A Dish for ...

Test whether the player can really dispell a buff or debuff, given its talents.

CBRipoff

Heads-up minimap display

Add-on that allows you to setup and quickly switch between different profiles of your action bars

Pins on the World Map for quests you have not completed yet

FuBar_OutfitterFu

FuBar_AlchemyFu

Swiss Army knife for instances, including player tracking, ignore buttons, loot tracking, notes, and more.

Loot Distribution System

Provides a quick display for the LFG Call to Arms

Dropdown library for Ace3 options, extensible to other options formats. Works ok.

BuffMe

Display bag usage on each of your bag slots.

Hemlock

Stores a browsable database of spells that mobs cast

Buffalo

Friends & Guild Data Broker plugin.

Client for allowing the raid leader to gauge interest on items in a method similar to a ready-check.