There are lots of pointless things you can do with Apple's iPad, but I was not expecting to find one so close to my interest in representing Time. It is French Revolutionary Clock by Miller Tinkerhess. It does very little – just displays a photographic image of a clock-face for a 10-hour day with the moving hands telling the correct time in Republican hours, minutes and seconds – but it does it well.
If you have an iPad dock, you can have a nice (expensive) Republican clock on your desk. Though not as expensive as buying a real survivor from the eighteenth century of course.
I mentioned the French Republican Calendar a couple of posts back. I am currently reading a fascinating PhD thesis on the subject, but more on that later.