Play Store API is an unofficial version of Google Play Store which will let you pullup applications from google play store using18 different functions covering almost everything from google store
PHP class to search the Google Play Music store
PHP implementation of the java Android Market API
PHP receipt validator for Apple iTunes, Google Play and Amazon App Store
The Play Later functionality from Rdio for new releases using Spotify
It is a system aiming to amuse and entertain people. Inspired by the old jukebox, a machine that reproduces music to insert coins, this system enables the choice of music that will be played on the environment.
Google Play Music API for a Smart TV Interface