Client Skins

Skins change how your client interface (i.e. skill and item windows) looks like in game.

You can make your own or download them:
Nekosiwa
c*c spica
GL RO Skin Slide
Scry's skin folder

If the downloaded skin is in the form of a *.zip or *.rar file, extract the contents (with WinZip, WinRar, 7-Zip) to your RO/skins folder:
C:\Program Files\Gravity\RO\skin

You can then change the skin ingame by pressing Alt + O