You’d select a photo or any file to transfer, bump your phones together and ta-da, it was sent over. No accounts or friend lists necessary.

It used a mix of geolocation and wireless signals to determine the match and worked flawlessly. You could even do the same with a computer by bumping the phone against the spacebar!

This was over a decade ago. It’s very depressing to see great tech like this just disappear into the void.