MusiTapp

This app allows you to place your phone on a table and then knock on it to play, pause, go one track back, or one track forward. It works based on accelerometer data and currently only supports the default music player on your phone.

Contributors to the app include: Vinodh Nagarajan (https://play.google.com/store/apps/developer?id=Vinodh+Nagarajan), Raj Bhanushali (https://play.google.com/store/apps/developer?id=Raj+Bhanushali) and Ashwat Chidambaram.