Skype is a commercial program has been devised by both Almstmaren Swede Niklas Zennström and the Dane Janus Friis with a group of software developers. Skype users can program to connect audio (telephone) over the Internet free of charge for users of the program, but with a simple cost of communication in the event of fixed telephone lines or mobile phones.

Microsoft bought the company for $ 8.5 billion on May 10, 2011