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I already posted the tutorials from that site but they released free icon set and it rocks check out!!
Today we are glad to release Practika: a free set of 11 practical and useful high-quality icons, designed by DryIcons, especially for Smashing Magazine and its readers. The icons are available in resolutions 64×64px, 128×128px and 256×256px, in 32-bit transparency PNG. These icons can be used for a variety of purposes — in particular, in portfolios and in corporate designs.

Practika: A Free Icon Set | Freebies | Smashing Magazine