Skype is a software application that allows users to make voice and video calls over the internet as well as send instant messages and files. It was developed by Estonian programmers in 2002 and gained popularity for its additional features beyond calling. Skype has been used successfully by educators to facilitate online classes and collaborations between students in different locations through features like screen sharing, whiteboarding, and video conferencing. Teachers report that using Skype helps broaden students' global perspectives by allowing them to connect with people in other countries.