A funny or interesting piece of software is something people are always likely to link to on blogs and social networking sites.
A great example of one such piece of software is the Death by Caffine calculator from Energy Fiend. Simply enter your weight and your favourite caffeinated food or drink and the tool will tell you how much you'd have to consume to kill yourself.
It's safe to say that this was a major viral success and has already secured over seven thousand links for Energy Fiend.
Energy Fiend's Death by Caffeine Calculator