If you ever dreamed of printing images in much larger size than what your personal printer allows (let’s say 3′ by 6′), you have either to buy a very expensive printer or use a very expensive photo printing service. You see the common words here: very expensive.
The Rasterbator creates huge, rasterized images from any picture. Upload an image, print the resulting multi-page pdf file and assemble the pages into extremely cool-looking poster up to 20 meters in size.
The quality is only limited by your ability to correctly assemble the pages.
Nota bene: It’s much better if your printer uses all the surface of the paper and does not leave a white border.