Unlike official Minecraft, Eaglercraft 1.21 clients come pre-loaded with skin customization.
(End Scene: Player walking into the sunset with a 'Netherite' sword that is actually just a retextured Diamond sword) eaglercraft 1.21 10
Developers like Nate2018 host repositories that you can "fork" and deploy via to play in a browser. ViaVersion / Plugins Unlike official Minecraft, Eaglercraft 1