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.

The Tango icon library contains a basic set of icons for the most common usage. To make it easier for a developer to find an appropriate icon for their application a number of aids are there to help.

The SVG versions of the icons contain useful meta information such as keywords which enable searching. The naming specification defines structured naming scheme that also helps.