Open Icon Library- wonderful collection of icons, flags, information symbols
Gimp Savvy- a collection of copyright free photographs
Grunge Textures- free texture graphics
Icon Finder- another icon collection website, very easy to search
Top 40 Nature Photos- this is on Flickr so if you district blocks this site, you will have to wait until you are home!
Citrify-a photo editing website, free.
Font Squirrel- collection of free downloadable fonts
Pics4Learning- large collection of photos, well organized
Free Clip art by Phillip Martin- very educationally focused clip art, appropriate for grades K-3.