WowAce

Another HUD addon

Show the transmog appearance of an item when you mouse over it, and shows collection-status in bags, shops, and elsewhere. Works on transmog, mounts, pets, and decor.

A modular, lightweight and screen-estate saving grid of party/raid unit frames

Dog-themed unit frames. Woof. Arf. Yip.

Chat addon, filtering messages and UI changes

EBB adds groups of bars to your screen showing you which (de)buffs currently affect your toon or some other units.

Manages social information with a focus on main-alt associations.

AddOn development framework

Makes the default frames moveable via simple drag and drop

oUF element for highlighting debuffs that are dispellable by the player

Compact rune and proc display for Death Knights.

Displays information about the current zone on the World Map

A library to provide information about zones and instances.

Animated target indicator

Restores access to removed interface options in Legion

Changes the look of the default UI

A customizable view of friends and guildmates.

Drop the cheapest thing you're carrying

A library to provide a markup syntax

A library to provide unit-oriented tags to LibDogTag-3.0