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.
A while ago I created a lot of icons for web applications I designed while working for the most excellent employer there is: Manentia Software. Now, we decided to liberate them with a Creative Commons license for everyone to use and enjoy!
source for graphical user interface enhancements for Mac OS X, Microsoft Windows, and Linux. We specialize in desktop wallpaper, icons, themes, and news with a focus on community.