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Skype is a peer-to-peer Internet telephony network founded by the entrepreneurs Niklas Zennström and Janus Friis, also founders of the file sharing application Kazaa.
Votes:
1998
Skype
55.6%
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MSN Messenger was a freeware instant messaging client that was developed and distributed by Microsoft between 1999 and 2005 for computers running the Microsoft Windows operating system, and aimed towards home users.
Votes:
1594
MSN Messenger
44.4%