Nitrokey App is a cross-platform (runs under Windows, Linux and Mac OS)
application created to manage Nitrokey devices. Lately developed under
Ubuntu 17.10/18.04 with Qt5.9. Underneath it uses libnitrokey to
communicate with the supported devices. Both Nitrokey App and libnitrokey
are available under GPLv3 license.

WWW: https://github.com/Nitrokey/nitrokey-app