Anyone know of a reliable source of decent quality icons that are available to developers to use in various projects?

I am aware of the various pay sites that do icons, such as http://www.windows-icons.com/ and http://www.iconshock.com/ and some of their stuff looks darn nice -- but their prices are also darn expensive.

I am looking for icons on the same general level of quality (not necessarily the same level of polish, but the same general look and feel to the icons). I will pay if needed, as I do need to expand my icon resources library, but freeware, shareware, or other models would also be appreciated. Thanks in advance for any information any of you graphics gurus can throw my way.