Cesar Hernandez has uploaded the latest version of the ZEsarUX multi-emulation system for Unix system. It emulates various Sinclair systems, including MK14, ZX80/81, Spectrum, QL and Z88, plus various other compatibles and related systems. ZEsarUX source code and binaries are distributed under GNU GPL license.

Read about this sytem on Github at https://github.com/chernandezba/zesarux Compiled binaries are available for Linux, Mac, Windows and Paspberry Pi systems, from https://github.com/chernandezba/zesarux