Free Icons

• 32x32: http://www.fatcow.com/free-icons
• 16x16: http://www.famfamfam.com/lab/icons/silk/
• all (simple): http://www.axialis.com/free/icons/index.html
• svg 48x48: http://commons.wikimedia.org/wiki/GNOME_Desktop_icons_2.20