ElvUI and TukUI are full user interface replacements for World of Warcraft, which means they completely replace default UI. You can customize every single part of your UI to your liking. ElvUI is a more user friendly. TukUI requires you to do more work to get everything just right.
To see popular custom ElvUI layouts go here
AbyssUI is a minimalist World of Warcraft interface. It changes parts of the interface so you can have a more customizable and clean UI. The goal was to have a high customizable interface that changes little of the wow artwork or functionality.
Brings the Retail UI to WoW Classic! No carbon copy of the new retail Dragonflight UI, but a faithful adaption with extra, classic related features. Based on the default UI, so most other addons should work without problems. Completely modular: (de-)/activate any feature you want or don't want!
GW2 UI is based on the Guild Wars 2 UI and aims to increase immersion and efficiency. The entire UI is hand-painted, and hand-coded. Each interface element has been (or will be) rewritten, to provide enhanced functionality as well as improve the user experience.
A visual interface replacement for World of Warcraft. It restyles the default interface, while adding many useful features. It requires no setup, and is configurable in-game.
LUI is a User Interface dedicated to replacing the standard Blizzard UI. LUI v3 one of the most advanced and elaborate User Interfaces ever made.
100% standalone code designed to feel like Bliz meant the UI to look this way. nUI removes a ton of clutter from the display, provides detailed targeting information, an integrated HUD, cooldowns and more all in one tightly integrated single-source addon that requires no user configuration.
SpartanUI is designed to free your screen by moving a majority of the interface elements to the bottom.
Minimalistic and modular enhanced WoW Interface with an intuitive and powerful configuration menu.
