[ excerpt from developer's web site ]

Think of it like Crystal SVG, but way simpler-looking and with more
shadows.  Shadows are cool.  OS X has shadows.  OS X is cool.  You
may have to edit the "index.desktop" file, to inherit from crystalsvg,
so as to avoid having all those nagging blank icons.

WWW: http://www.kde-look.org/content/show.php?content=9781