These icons are in vector format, and that means you can resize them as you need and use as the elements of the user interface or replace the standard icons in your OS. In addition, vector format allows you to modify any object of the icons. For example, you can replace the text or recolor their objects creating new versions of the icons.
Vector provided today will be available for free download until July 2, 2013. Simply click on the name or image of the icon set to download the file from Depositphotos.