NFC Ring
From Just Solve the File Format Problem
The NFC Ring is one ring to rule them all... my precioussssss. It is a fairly plain-looking ring (no elven runes on it, apparently) that interfaces with compatible NFC (Near Field Communication) devices including mobile phones, door locks, payment systems, etc., so it can be very powerful. It's being developed (and was funded by a Kickstarter campaign) by a British person, as seen by the £ sign on the Kickstarter page.
