FreeImages.

<[[Brennen]]> Recently I found [http://vampirefreaks.com/u/twistedmisfit an unexpected but wonderful re-use] of a [http://p1k3.com/2004/2/17 glowing skull] I did once. (An image which is number four, no less, in a Google image search for [http://images.google.com/images?q=green%20skull green skull].)

http://p1k3.com/2004/2/17/green.png