Calypso is described as 'Formerly Kommute, is a cross platfrom file sharing client using the anonymous network MUTE. Developped using C++ and Qt. For windows and linux, portable to other environments. You can try it by following the installation instructions below' and is an app in the file sharing category. There are more than 100 alternatives to Calypso for a variety of platforms, including Windows, Mac, Android, Linux and iPhone apps. The best Calypso alternative is Tor, which is both free and Open Source. Other great apps like Calypso are Transmission, Proton VPN, Mullvad and Deluge.