Skype has marked VoIP, and has somewhat set the standard of PC-based calling all over the world. Very often, when people want to communicate to their dear ones abroad for free, the first (and most of the time, only) thing they speak of is Skype. Many still don't know that there are dozens of applications and services like Skype out there, that could maybe be more befitting to their needs. So, Skype has become the reference for international free calling.