Skype is a little piece of software that lets you make free calls to anyone else on Skype, anywhere in the world. Skype uses P2P (peer-to-peer) technology to connect you with other users. It offers several features, including SkypeOut calling from Skype to regular and mobile phones worldwide, conference calling, and secure file transferring. You can also share your screen with other users. If you and your friends, family or business contacts are using webcams, you can make free video calls. And even though the calls are free, they are really excellent quality and secured with end-to-end encryption. You can as well call landlines and mobile phones at really cheap per minute rates.