Silk Icons (http://www.famfamfam.com/lab/icons/silk/)

“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.

License

I also love to hear of my work being used, feel encouraged to send an email
with a link or screenshot of the icons in their new home to mjames at gmail dot
com. This work is licensed under a Creative Commons Attribution 2.5 License.
This means you may use it for any purpose, and make any changes you like. All I
ask is that you include a link back to this page in your credits (although a
giant link on every page of your website really isn't needed, contact me to
discuss specifics).

The icons can also be used under Creative Commons Attribution 3.0 License (Hi
Debian folks!) with the following requirements:

    As an author, I would appreciate a reference to my authorship of the Silk
    icon set contents within a readme file or equivalent documentation for the
    software which includes the set or a subset of the icons contained within.
