Skype has now a new version 6, which is available for Windows and Mac. The new version includes new features such as single sign-on using Facebook and Microsoft credentials. As a result, new users are not required to register separetly as Skype users, furthermore new capabilities include retina display simplified design for Mac users and multi-window chats which allows users to interact using multiple windows simultaneously.
For Windows users they are now capable to chat with Live Messenger and Outlook contacts, as it is was possible before with Facebook contacts. It is expected that upcoming versions will include voice and video calls within Microsoft network contacts.
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