You can now use Skype without an account

Microsoft is making Skype a little easier to use without the need for a full account. While Skype has allowed group chats with guests, Microsoft is now enabling all of Skype's audio and video calling features to be used without an account. Skype users can create a special conversation that link that can now be shared with anyone to enable messaging, voice / video calling, and screen sharing, all free without an account.
Skype without an account works on the web, and up to 300 people can par