Free icons of good quality

Mark James, a part-time web developper, produced more than a thousand slick little icons that are distributed freely on famfamfam.com. This work is licensed under a Creative Commons Attribution 2.5 License, which means that if you want to use them, you only have to remember to state clearly that Mark James is the author and to include a link back to his web site.

I like the silk icon collection, but there is also a very useful collection of 239 small country flags.