Beacons being relatively new technology, there is a certain amount of learning involved for customers before their large scale adoption. And the best way to evangelize is by showing them what beacons can do.
Now you can do this without really going through the hassle of building a demo app for your beacons.
You can download the demo android app for free from this link.
And activate the app to work with any Estimote beacon/virtual beacon at run time ( no additional coding needed) by following the simple steps mentioned there.