Other
Net2 Phone
Net2Phone is a software program that allows you to make free phone calls from your PC.
![Cornell University: Experimental Study of Skype [Pdf] Website](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Cornell University: Experimental Study of Skype [Pdf] Website")
Other
Cornell University: Experimental Study of Skype [Pdf]
This white paper on Skype describes and experimental study of the Skype Peer-to-Peer VoIP system. It particuarly focuses on the concept of supernodes, and how Skype differs fundamentally from earlier P@P systems that are oriented toward...
Other
Columbia University: Analysis of Skype Peer to Peer [Pdf]
This academic paper gives a very detailed, technical explanation of the Skype peer-to-peer internet telephony protocol. Diagrams are included that illustrate the Skype network and message flow. (2004)
Goodwill
Gcf Global: Google Hangouts
In this tutorial, learn how to send texts and make voice and video calls on your computer or mobile device using Google Hangouts.
Wikimedia
Wikipedia: Skype
This article introduces the reader to Skype, a peer-to-peer Internet telephony (VoIP) network.Skype users can speak to other Skype users for free.