Fuse - Windows
Fuse (the Free Unix Spectrum Emulator) was originally, and somewhat unsurprisingly, a ZX Spectrum emulator for Unix. However, it has now also been ported to Mac OS X, which may or may not count as a Unix variant depending on your advocacy position. It has also been ported to Windows, AmigaOS and MorphOS, which are definitely not Unix variants.
Accurate 16K, 48K, 128K, +2, +2A and +3 emulation.|Working +3e, SE, TC2048, TC2068, TS2068, Pentagon 128, Pentagon "512" (Pentagon 128 modified for extra memory), Pentagon 1024 and Scorpion ZS 256 emulation.|Runs at true Speccy speed on any computer you're likely to try it on.|Support for loading from .tzx files, including accelerated loading.|Sound (on Windows and Mac OS X, and on systems supporting ALSA, the Open Sound System, SDL or OpenBSD/Solaris's /dev/audio).|Kempston joystick emulation.|Emulation of the various printers you could attach to the Spectrum.|Support for the RZX input recording file format, including 'competition mode'.|Emulation of the DivIDE, Interface I, +D, Beta 128, Kempston mouse, Spectrum +3e, ZXATASP and ZXCF interfaces.