Fuse (the Free Unix Spectrum Emulator) was a ZX Spectrum emulator for Unix. But, it has now also been ported to Mac OS X, Windows, AmigaOS and MorphOS. The 16K, 48K, 128K, +2, +2A and +3 Spectrums are emulated accurately. For AmigaOS there is a version available made by Chris Young and Q-Master made a version for MorphOS.