I've been doing this for quite a while now with Knock [1]. It's pretty good, though I have to remember to take my phone with me when I leave my desk at work fo

I've been doing this for quite a while now with Knock [1]. It's pretty good, though I have to remember to take my phone with me when I leave my desk at work for an extended period of time. It's nice to be able to walk up to my desk, tap my phone while it's in my pocket and see the computer unlock. [1] http://www.knocktounlock.com http://www.knocktounlock.com