This is perhaps the most morbid, frightening thing I have ever seen or posted, but it's important. See Your Folks will scare you into visiting your parents more by estimating how many times you have left to see them before they die.
The site asks you which country your parents live in, how many times a year you visit them, and your parents' ages.
Then, based on the World Health Organization's life expectancy data (2011), you get a result like the one above.
Other factors will contribute to your individual parents' lifespan and none of us like to think about death, but this not-so-subtle reminder can help us focus on what's most important in life. Go see your folks or at least give them a call.