ArcEm is a portable open-source emulator designed for the Acorn Archimedes. It is capable of running various operating systems, such as RISC OS and ARM Linux, and can be used on multiple platforms including Amiga OS, Mac OS X, Microsoft Windows, RISC OS, and Unix. The developer page offers opportunities for individuals interested in contributing to the project. The latest release, ArcEm 1.50.2 for RISC OS, focuses on resolving compatibility issues with previous versions. Future updates are anticipated, including support for new machine models and improvement of performance on slower hardware. Users are encouraged to download the latest version from the SourceForge project files page.
https://arcem.sourceforge.net/