Kazaa and FastTrack were originally created and developed by Estonian programmers from BlueMoon Interactive[REF] including Jaan Tallinn and sold to Swede Niklas Zennström and Janus Friis (who were later to create Skype and later still Joost and Rdio).
Initially, some users of the Kazaa network were users of the Morpheus client program, formerly made available by MusicCity.