Skype

Skype is a proprietary Voice over IP service and software application.

The service allows users to communicate with peers by voice using a microphone, video by using a webcam, and instant messagingover the Internet. Phone calls may be placed to recipients on the traditional telephone networks. Calls to other users within the Skype service are free of charge, while calls to landline telephones and mobile phones are charged via a debit-based user account system. Skype has also become popular for its additional features, including file transfer, and videoconferencing. Competitors include SIP andH.323-based services, such as Linphone^[13] and Google Voice.

Unlike most other VoIP services, Skype is a hybrid peer-to-peer and client–server system. It makes use of background processing on computers running Skype software. Skype's original proposed name (Sky Peer-to-Peer) reflects this fact.

You can download it from HERE

skype features

• Calling
• Skype-to-Skype
• Phones and mobiles
• Online Number
• Conference calls

• Skype To Go number

• Video
• Video calling
• Group video calling
• Screen sharing

• Messaging
• Instant messaging
• Send files
• Sending SMS
• Facebook

• Managing
• Skype Manager
• Skype Connect