WowAce

ClassColors

Depot

DelMapa

Add-on that shows in a unit tooltip window a number of killed mobs of the same kind

Assist you with faction transfers letting you know which mounts, spells, etc you have and what they will be swapped to.

Adds filters for Legion items to AdiBags

Seraphim Raid Tracker

MobHealth

A system config addon to WOW

Fixes strata bugs in UI windows

PoisonMenu

A library to handle rearrangement of blizzard's frames when bars are added to the sides of the screen.

ComboSounds

Provides information about the player's bodyguard.

A module that lets you find out what today's dailies are without having to visit the quest givers.

Create reagents easily

Shows who controls Wintergrasp and the time until the next battle.

Lists Pots and Herbs you got on all chars and allows you to specify color coding

Deformat

OneChoice tries to help you reduce quest reward choices down to, ideally, one choice.