I thought I had blogged this before, but I guess not. Check it out – 1000 free icons for use, you only have to attribute the source (they’re Creative Commons licensed).
“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.