As a Android developer I have

Play store account https://play.google.com/store/apps/developer?id=Gunaseelan+Arumaikkannu

And I have a blog with sample tutorials in http://v4all123.blogspot.in/

And also some video samples in https://www.youtube.com/watch?v=MZxVIE9-_G8&list=PLZZqikn3YE-PSKfB8dHFqzn0wr62tIqCR