Zach Holman recently tweeted this same question: https://twitter.com/holman/status/824767207699734530 https://twitter.com/holman/status/824767207699734530 The

Zach Holman recently tweeted this same question: https://twitter.com/holman/status/824767207699734530 https://twitter.com/holman/status/824767207699734530 There a few suggestions, but one of note was this (yet to be released) product called That Key: https://twitter.com/ramseychapin/status/821071516322234368 https://twitter.com/ramseychapin/status/821071516322234368 http://thatkey.com/ http://thatkey.com/ The founder claims it will be released soon.