(If you would like to add your project’s name to the list, don’t hesitate to send us an email.)
ArduPilot Project is an Free Software autopilot system for various vehicles: multi-copters, helicopters, planes, boats, submarines, rovers… It uses Monocypher to secure its bootloader.
Signify implementation in PicoLisp (Signify is a file signature/verification utility).
The TKey is a USB security key inspired by measured boot and DICE that can execute arbitrary programs. It uses Monocypher in some of its associated applications (a signing oracle and an SSH client token). This third party application also uses Monocypher to turn TKeys into a decryption tokens. It talks to this plugin written for the Age encryption program.
World_Gate is a platform to build, run, and share a multi-agent strategic environment. One of its applications is to run tabletop games on a network of computers. It uses Monocypher to secure its online communications.