WowAce

Rebuff yourself with the mousewheel.

Display Cooldown Count of Spell Icon and Item

GrindStatus

Configurable Castbars

Database of Diminishing return categories and general data

Bulk mail reception made really easy

Display aura information inside action buttons

Database of item upgrade IDs

Configure triggers to send messages to your raid team such as timers, rotations, and health/power based triggers. Raid smarter not harder.

mount and companion manager

Visualises healing.

Sells all junk in your inventory at once.

Keeps track of quests.

SRA

XRS

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

Smooth combat HUD based on ArcHUD2

Create panels for customizing your UI, sucessor to eePanels

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

FlexBar2