Skype – a popular software to communicate between users in the internet. The software allows you to make voice and video calls, exchange text messages and send video or photo messages. Skype enables to create a conference with a large number of users, interact with them and share the files. The software also enables to make calls to mobiles and landline phones around the world at low rates. Skype contains a set of tools that gives the ability to customize the software to needs of the user.