MonoFactor released Free Vector Icon Set. The first part of the set contains 25 scalable Illustrator format icons. The second part of the set is Turqua – 3D Isometric Icons You can open the .ai file with any version of Illustrator above 8.0. With earlier versions, you might loose some of the effects on the icons.
“Silk” is a smooth, free icon set, containing over 700 16-by-16 pixel icons in strokably-soft PNG format. Containing a large variety of icons, you’re sure to find something that tickles your fancy. And all for a low low price of $0.00. You can’t say fairer than that.