OxyElegant is a set of folder icons in four different colors (at least that's the plan):
Green, blue, bronze and sand. By now the green one does contain the most icons because that's the one I use, followed by the blue one because original oxygen is blue.

There also will be a fifth set which contains icons that can be used with either color set, you might want to download and install that one too.

OxySeasons also is split into several sets: spring, summer, autumn, winter and a special xmas theme.