Nuvola
Nuvola (from Italian Nuvola, cloud ' ), an evolution of the SKY theme is a free icon set by David Vignoni licensed under the LGPL 2.1. Although it was originally designed for work environments such as KDE or GNOME, there are also packages for Windows and Mac OS X. The final version 1.0 contains about 600 icons in Portable Network Graphics (PNG ), but there are also SVG versions.
The icons, usually colorfully decorated, contain ordinary and easily recognizable objects that can be easily associated with the corresponding applications. The dominant color is blue, but there are also icons that have a completely different color scheme.