Categorized under the “useless, but cool” folder, you have antipodr.

What does it do?  It calculates any location you give it’s location on the other side of the planet.  For example, when I gave it Texas – it told me if I kept digging all the way though the planet and came out the other side – I would be somewhere in the Indian Ocean, and not China like my grade school teachers told me.  You can enter in an address, city, state or zip code to view the results.

Have time to kill?  Play with antipodr and thank me later.