HamSphere is a virtual amateur radio software that allows users to communicate with other radio operators around the world using a computer and an internet connection. It simulates the experience of using a real radio, including features like frequency tuning, modes of operation, and signal strength. The software also includes a variety of tools for learning and practicing radio communication, such as a built-in Morse code tutor, a DX cluster for finding and connecting with other operators, and a logging system for tracking contacts. Finally, HamSphere offers a range of customization options, including the ability to create custom radio stations and antennas, and to design and upload custom QSL cards to exchange with other users.