ZEsarUX is a multi-emulator written by César Hernández. It's under active development and runs on Linux and Windows.
I've used ZEsarUX to emulate several models of the ZX Spectrum (though I use Fuse for my development projects) and especially the Z88. It works great and has interesting features. Now version 4.1 of ZEsarUX emulates also the SAM Coupé. I can not try it at the moment because these months I'm temporarily in a place where my only internet connection is a slow GPRS, and downloading the 22-MiB source archive is beyond my imagination :) But I'll try it ASAP. Here you are: http://sourceforge.net/projects/zesarux/ -- Marcos Cruz http://programandala.net