An experimental Node.JS multi-cpu image server
I am collecting them from various sites and I am not sure about the licensing requirements.
Some (and not all) background images have been downloaded from http://subtlepatterns.com/; it’s a great site, you should definitely check that if you have a thing for patterns.
If, by any chance, you happen to own any of these images, please let me know so that I can give proper credit to where its due.