Mojoptix designed and built a sundial that displays the time in its shadow. You can download the 3D printer files on Thingiverse, or buy one on Etsy.
Fun fact about this sundial: You will most likely never see it in a supermarket or a department store. The swiss cheese inside the sundial is so intricate, that you can't realistically use injection molding, or some other mass-production method. 3D printing seems actually to be the only practical way to build this digital sundial ! (is that really true ?? let me know what you think in the comments !)
