WowAce

Entropy skins for Masque.

Configurable Castbars

Provides one or many informational windows with optional interactive widgets.

FlexBar2

Show buffs on nameplates.

Bulk mail reception made really easy

SRA

mount and companion manager

Display Cooldown Count of Spell Icon and Item

Keeps track of quests.

GrindStatus

XRS

Collects Herbs, Mines, Gas Clouds and Fishing locations and adds them to the worldmap and minimap

Database of Diminishing return categories and general data

Shows simple Buttons for your Cooldowns :)

Automated smart raid marking to speed up trash clearing in instance runs

Database of item upgrade IDs

Sells all junk in your inventory at once.

Try on different gear and see their total stats and their differences. In short, an ingame CT-Profiles-like addon.

Shows skills in a tooltip and allows them to be used.