You may have seen MagicJack on a late night TV infomercial, home shopping network or even on the shelves of your local electronics or drug store. Its ads make seemingly wild claims of drastically reducing your phone bill, but it may do just that. MagicJack is a small, inexpensive USB phone adapter that allows you to bypass traditional phone services and make calls via Voice over Internet Protocol (VoIP) to regular cell phones, landline phones or other VoIP users.

MagicJack  is compatible with Windows XP, Windows Vista, Windows 7, and Intel-based Apple Macintosh OS.  Linux and non-Intel Mac users are currently out of luck with both versions.