Tick Tock, The Ticking Clock...
I've recently used an egg timer to aid productivity. It's great - I wind it up for ten minutes then work feverishly while it ticks away. The ticking is an audible, urgent reminder to WORK!
I've tried using Slimtimer in a similar way, but it's too easy to forget! I can't even see it! But if it was ticking...! Well, that would really help create a sense of urgency. Obviously, not everyone wants a ticking clock, so it would need to be optional.
A ticking clock is perfect for anyone that's trying time-boxing. Vote for it!