WowAce

Helps you automate selling stuff.

Fancy up the PlayerPowerBarAlt frame

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

A library to get currencies' related information

Fancy up the ExtraActionButton frame

Improved Quest Tracker

Displays Pet Info for Hunters and Warlocks. Also keeps track of Stables and Pet and Demon skills.

Alternate Rune Display

TuiRaidTracker

BarAnnounce3

Loot Distribution System

Dims action buttons.

Constructs a SimC export string for an item without equipping it

Automatic Refilling of User Defined Items

FuBar_UIReloadFu

Outdated! Please use 'XLoot', available on Curse and WoWI

Shows you the radius of your totems.

Niagara

tracks and share quests between your party

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