Whether you want to impress your alpha friends or just confuse all of your normal buddies, a binary clock is a sure fire way to achieve your goal.
As you may have guessed, this simple clock uses binary to display the current time down to the second, with a hypnotic tick-tock sound to back the purple and cyan dots. No preferences, no frills. Great utility to satisfy the geek in all of us!
Also worth noting is that the methodic ticking and color changing has the ability to keep babies and toddlers entralled for hours.