The WonderCube Pro is a small keychain with a built-in charger, access for flash storage, and a lot more. You can get one of these all-in-one mobile keyrings on sale for $48.99 (reg. $70), or get ...

Or this: The Keyprop is a smartphone stand that rides shotgun on your keychain. Or it will, if developer Alison Wong raises enough funds. The Keyprop looks like your average plastic key, save for ...