Archive:Nuvola
Nuvola (from ita. "cloud"; Nuvola as evolution of the SKY icon theme) is an open source icon set drawn by David Vignoni, originally created for Linux desktop environments like KDE and GNOME, it was repackaged for Windows and Macintosh. Version 1.0 contains almost 600 icons. The default set is in PNG format, there is also a SVG version.
It's released under terms of GNU LGPL 2.1.