For quick access to some FREE graphic sites, check these out. I can never guarantee you that there aren't any viruses on any of these sites, but I think they are pretty safe to use.
Freegraphics.org provides some Free graphics!
Yahoo! has a lot of really nice links to some great Free graphics!
Microsoft has a lot of nice files to download for Free!
Awesome site for All types of Web Graphics including Animation
A Great Site to download Macintosh or PC fonts.