Skype; is a popular, easy to use and reliable (Voice over Internet Protocol)program, that allows you call and talk to other Skype users, video chat; and more for free over the internet. 

With Skype you can not only have voice chats on your computer – just like telephone, only for free – but also make real phone calls at much lower rates, using the SkypeOut service and paying with Skype credit. Besides voice chats, Skype also includes standard IM functionalities (written conversations, emoticons, user avatars and so on) and also lets you have group video conferences and share screens.

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