Fuse is a sinclair zx spectrum emulator. it supports several models (including 16k/48k/128k/+2/+2a/+3 and some clones), with quite faithful emulation of the display and sound.

its features include:
* accurate spectrum 16k/48k/128k/+2/+2a/+3 emulation.
* working spectrum +3e and se, timex tc2048, tc2068 and ts2068,
pentagon 128, "512" (pentagon 128 with extra memory) and 1024 and
scorpion zs 256 emulation.
* runs at true speccy speed on any computer you're likely to try it
on.
* it can load z80, szx and sna snapshots, tap and tzx virtual-tape
files (including accelerated loading), mdr microdrive images and
dsk floppy disk images, among many others.
* sound.
* built-in debugger.
* emulation of most of the common joysticks used on the spectrum
(including kempston, sinclair and cursor joysticks).
* emulation of some of the printers you could attach to a spectrum.
* support for the rzx input recording file format, including
rollback and 'competition mode'.
* recording of movies to fmf files.
* emulation of the divide, interface i, kempston mouse, spectrum
+3e, zxatasp, zxcf, beta 128, opus discovery, +d, spectranet,
speccyboot, specdrum and disciple interfaces.
this package provides files common to all versions of the emulator. to get the actual emulator, install fuse-emulator-gtk or fuse-emulator-sdl.