Tango Top Quality Vector Icons

Tango Icon Library provides developers a set of professional high quality icons. They are in PNG ( Transparent background which can easily integrate into any web site) and SVG format ( Scalable which means you can increase the size of the icons without losing quality.

Requirements: Any Browsers
Demo: http://tango.freedesktop.org/Tango_Icon_Library
License: Creative Commons Attribution Share-Alike license