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Spotify

Spotify is an online music streaming service. Spotify uses a freemium model, offering a basic service free of charge while enticing customers to upgrade to a paid subscription plan that includes mobile applications and advertising free stream. Spotify is available for multiple platforms including Windows, OS X and Linux as well as iPhone, iPad, Android, Blackberry and Windows Phone.

Whatsapp

WhatsApp Messenger is a cross platform mobile messaging app for smart phones such as the iPhone, Android phones, Windows Mobile or Blackberry. Whatsapp allows users to send and receive messages, photos, and other information and is considered an alternative to text messages or SMS.

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Amazon

Amazon is an online store which sells both physical as well as digital goods. Amazon also develops the Kindle, which is available as an e-book reader as well as a tablet computer. Amazon Web Services is a provider of cloud computing services.