WowAce

Heads Up Display with Player and Target Info

Calculates optimal reforging for given weights/caps.

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

A library that handles the basics of "window" style frames

Detox

YssGuildShop

Fubar_ChannelWatchFu remade for Broker

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

Loudmouth

Gives detailed descriptions of particular localities, as zones or instances, and provides optional TomTom integration.

Tracks the precise arrival & departure schedules of boats and Zeppelins around Azeroth and displays them on the Mini-Map and ...

Automates bites during the Blood-Queen Lana'thel encounter in Icecrown Citadel

Show extra information about Jewels and Enchants in tooltips.

Provides database of quest giving npcs/mobs/objects for display on the World Map/Minimap

Display an informational fighter jet style HUD while flying or riding

PT3Bar

RoleCall allows you to easily see the talent specs and roles of everyone in your group.

Considers an item against all the items you have to determine whether or not it is an upgrade

InspectFix

NShakedown