WowAce

Alternate Power- and Combopoint/SoulShard/HolyPower-bar

Display Cooldown Count of Spell Icon and Item

Bayi's Extended Questlog

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

Keeps track of HoTs, DoTs, Buffs and Cooldowns. With audio and text alerts to refresh them.

Watches your chat, flagging missplled words, and offering correctly spelled suggestions.

GrindStatus

Shows simple Buttons for your Cooldowns :)

Automatically enables or disables combat logging based on location.

Manufac

FlexBar2

Adds countdown voices from Heroes of the Storm to BigWigs for all supported locales.

Checks your gear before bosses and yells at you if you're an idiot

Raid Frames using the oUF framework.

A blizzard group finder replacement

Track all threat redirection ability transfers and cooldowns (Misdirection and Tricks of the Trade).

Enables multi-line/unlimited-length pasting of text or commands into WoW

Create panels for customizing your UI, sucessor to eePanels

Regain that wasted space!

XRS