Pressy brings a customizable hardware button
So you picked up that shiny, new Android handset and now you find yourself wishing there was an easier, button-based shortcut for getting to your favorite Android functions. Wait a minute… you actually want more buttons on your smartphone? It's 2013 ...
Pressy, the “almighty Android button,” meets Kickstarter goal in a single day
Yes, Please: Pressy Is a Customizable Extra Button for Your Android Phone
Add a physical button to any Android device with Pressy