If you have got that little artist hiding in you, this is the time to let it out and utilize some really cool and awesome available graphics on the Internet. BazaarDesigns has a fascinating collection of various arts and graphics ranging from web buttons, icons, vector graphics, photoshop brushes, templates and stock photos etc.
Majority of [...]
Not necessarily Google Image will satisfy you when looking for 3d icon images for various categories. A site dedicated to bring you open license cool 3D icons is IconLook. These are generally OS-type icons, for stuff like applications, documents and search buttons, nothing very fancy though.
Check out the few examples: