The Versatile Commodore Emulator began as a Linux-based emulator for the Commodore 64, which some of the earlier Ultimas were built for or ported to. It has since grown into a cross-platform project, with builds for at least twenty different operating systems.

Some of the major ones are available for download at the project entry. I’d say they are again available for download, but since I had previously only ever hosted the source code tarball…