Commandr expands on Google Now by giving its users the ability to toggle hardware switches and control music with simple voice commands. There isn't a standardized way for third-party developers to do such a thing, but that hasn't stopped this developer from coming up with a product worth watching. The original release was more cool than practical, but version 2.0 goes a long way towards correcting this.
Previously Commandr required users to say "Note to self" before every action, resulting in the very awkward, "OK Google, Note to self, turn off wifi." Now the middle bit is no longer required.