Canonical has announced the availability of Skype as a Snap file, the universal Linux app packaging format. The release means that Skype can deliver its communication service to a wider range of Linux users, not just those who run Canonical's Ubuntu Linux distribution. Skype, a Microsoft product, is an application that lets users make video and voice calls, and send files, video and instant messages. Skype-to-Skype calls are free anywhere in the world. Premium features like voicemail, or calls to landlines and cellphones carry a cost.