Aniko's Avatar Editor adds a Wardrobe/Skin Editor to Minecraft, where you can change into, edit, or make skins live in-game, all without having to relog.

/wardrobe - opens up the wardrobe menu that leads to all the editors

Sorry, I am a little lazy in the feature description.

Features

In-Game Wardrobe & Instant Skin Switching (You can upload and instantly switch to skins in-game without having to relog)

Skin Creator 2D, 3D, & Pixel Grid Skin Editing (You can edit skins directly in-game with the skin editor built directly into the wardrobe) You can also Import, Export, or create skins from scratch with the skin editor.

Skin Layers & Keyboard Shortcuts (QOL features for the skin editor)

Layer Mixer (Allows the mixing and matching of bases to make skins easier if you're a person who makes a lot of bases, can go to the skin editor when finished to fix any inconsistencies.)

Includes many regular skin-making tools in the skin editor, though I will not list them all here! Some are shown in the photos, others can be found in-game. (More Pictures in Gallery)

If there are any bugs or feature suggestions, you can message me on @asioko on Discord.