Skinpls
The Skinpls mod enables players to use custom skins even on offline Minecraft servers. It supports loading skins from two sources: the official Mojang API (just enter a username) and the popular mineskin.org service.
Main commands:
/skinpls mojang <username>- loads a skin by player name from Mojang's database/skinpls mineskin <uuid>- uses a skin by identifier from mineskin.org
It's important to note that this mod is in early development stage. While the core functionality works correctly, the interface and error handling require further refinement.