Doldrusidus is an open-ended, obscure simulation realized as a multiplayer game taking place in a small universe. At its core, the engine is a simulation of entities possessing a number of different components that represent their properties. One such property is the ability to emulate machine code assembled for the uxn fantasy architecture.

• https://desertslug.itch.io/doldrusidus

Varaboy is a Game Boy emulator written in uxntal for the Varvara system.

Implementation of Unicode for Uxn

45M is a uxn-inspired virtual console with a 16x16 display and 256 bytes of memory.

There's also a manual:

• https://45m.m15o.net/manual.html