This is a discussion topic for the Ore project, Cosmetics. View the full project on Ore for downloads and more information.
NOTE: This is an experimental plugin, and as of now, it works only as an addon for GWMCrates.
In the future it might become a full-featured cosmetics plugin.
The possible effects are shown on the wiki.
The plugin officially supports the following languages:
unofficially (translation may be outdated):
And you can easily translate plugin yourself.