Bild Manipulation mit JavaScript
Sehr cool was manche Menschen mit JavaScript und Canvas anstellen.
Pixastic is an experimental library which allows you to perform a variety of operations on images using just a bit of JavaScript. The effects supported out of the box include desaturation/greyscale, invert, flipping, brightness/contrast adjustment, hue/saturation, emboss, blur, and many more. For the full list, see the documentation page.
Funktioniert natürlich nicht im IE, aber das kennt man ja schon 