Until retina scans and voice commands make keys obsolete, the Exotac Freekey is a welcome upgrade to the common spiral key ring that somehow has remained stubbornly difficult to use. Say you're going for a run and want to separate a key from the bunch: Pressing one side of the ring forces the other side open far enough to easily slide the key out (or in) – a process free of both frustration and fingernail pain. Each quick-release key ring comes with three group rings to help you organize your sets – or lend spare keys to the neighbors. [$7; exotac.com]