Kazaa and FastTrack were originally created and developed by Estonian programmers from BlueMoon Interactive[2] including Jaan Tallinn and sold to Swedish Niklas Zennström and Danish Janus Friis (who were later to create Skype and later still Joost and Rdio). Kazaa was introduced by the Dutch company Consumer Empowerment in March 2001, near the end of the first generation of P2P networks typified by the shutdown of Napster in July 2001. Skype itself was based on Kazaa's P2P backend, which allowed users to make a call by directly connecting them with each other.[3]