Skype is a software application that allows users to make voice calls over the Internet for free between other Skype users. Additional features include video conferencing, file sharing, and low-cost calls to phones. To use Skype, you download the application to your computer or mobile device and register a username. The basic Skype services are free to use, allowing free calls between Skype users. Skype can provide a way for foreign language students to communicate in real-time with native speakers of the target language to practice their skills.