Probably the oddest thing in the Universe

The Hitchhiker's Guide to the Galaxy books, radio series, television show and movies all employed the Babel Fish: a small, yellow alien fish that you could put in your ear. Once there, it fed on your brain waves and somehow translated any languages coming into your ear to your language. It served well as a translator throughout the universe. Many times I have wished for one of these little critters in real life to make it easier to understand foreign languages without taking the time or effort to learn them. Now there may be such a thing for real. Called The Pilot System, developed by Waverly Labs, it seems to work on a similar principle as Google translates. It you wear it, it listens to your conversation and communicates with your phone to translate what you hear, whispering it back into your ear possibly by magic.  Current languages it works with are French, Spanish, Italian and English.