See also:
Amiga Spectrum Utilities Emulators, converters and other utilities for handling ZX Spectrum using Amiga. http://newton.sunderland.ac.uk/~specfreak/amispecutils.html
ASp A freeware 48K/128K/+2 emulator for the Amiga. http://www.lasernet.plus.com/asp.html
ASpectrum An open source 48k emulator for DOS, Linux, and Windows. http://sourceforge.net/projects/aspectrum/
DSP An open source emulator designed in Delphi 6. http://leniad.cjb.net/
E++ A portable object-oriented emulator that emulates Space Invaders, Phoenix, Centipede and ZX Spectrum (aka Timex-Sinclair 2000). http://www.guybrush.demon.co.uk/e/index.html
EmuZWin A freeware 48 and 128 emulator for Windows. http://kolmck.net/apps/EmuZWin_Eng.htm
Ergon's ZX Spectrum Emulators Home of Zexcel (Spectrum 48k/128k emulator for Sinclair QL) and the ZM/hT system (emulator, Z80 dynamic compiler and converters). http://www.geocities.com/SiliconValley/Park/6533/zxemulators.htm
FBZX An open source 128K, +2, +2A emulator for Linux/SDL designed to work at full screen using the FrameBuffer. http://www.rastersoft.com/fbzx.html
Fuse Open source 48K/128K/+2 emulator for Mac OS X, Unix, and Windows. http://fuse-emulator.sourceforge.net/
Fuzzbug Freeware emulator for Mac OS by Richard Bannister http://www.bannister.org/software/fuzzbug.htm
GLECK Emulates 16K, 48K, 128K, +2, +2A, +3, Pentagon, Scorpion 256K, TK90 and TK95 on Windows 95/98. Handles the most common file formats. [English/Spanish] http://gleck.emuunlim.com/
Glukalka An open source 128K emulator for Linux. http://glukalka.sourceforge.net/
Ian's ZX Spectrum page Contains his ZX Spectrum emulator for Unix and X11, xz80, and some other Spectrum-related stuff. http://users.comlab.ox.ac.uk/ian.collier/Spectrum/index.html
JX-Speccy A ZX-Spectrum 48K emulator written in Java. http://www.ciunga.it/jxspeccy/
Mac Spectacle A Sinclair ZX Spectrum emulator for the Macintosh. http://little-bat.de/zxsp/download/mac_spectacle/manual.html
Nuclear ZX Emulates Sinclair ZX Spectrum 48K on IBM PC. http://melkor.dnp.fmph.uniba.sk/~garabik/zx.html
PocketClive Emulates ZX Spectrum 48k and 128k on PocketPC. http://pocketclive.emuunlim.com/
PsiXZX A port of the XZX ZX Spectrum Emulator to the EPOC 16 platform. http://www.gumbley.me.uk/psixzx.html
RealSpectrum A freeware 16K, 48K, 128K, +2, +2A, +3, Pentagon, and Scorpion emulator for DOS and Windows. Also emulates Multiface 128, Interface-1, Kempston joystick and mouse, DISCiPLE and +D, TRDOS and +3DOS support, and the Sinclair Network of the Interface-1 and MGT DISCiPLE via TCP/IP over the Internet. http://www.ramsoft.bbk.org/realspec.html
SPEC256 An emulator for ZX Spectrum that is capable of running modified games with 256 colours. http://www.emulatronia.com/emusdaqui/spec256/index-eng.htm
Spec128 Freeware Spectrum 128 emulator for the Acorn Archimedes. http://joekelleher.tripod.com/Spec128/
Speccy A freeware 16K, 48K, 128K, +2, +2A, +3, and Timex Sinclair models emulator for DOS, Linux/i386, and Windows. http://fms.komkon.org/Speccy/
Speccy.F9 Emulators and games. http://fourleggedostrich.com/speccy
SpecEmu Freeware emulator for Windows. http://homepage.ntlworld.com/mark.woodmass/specemu.html
Spectaculator A commercial emulator for Windows. http://www.spectaculator.com/
Spectemu A Sinclair ZX Spectrum emulator for Linux/UNIX http://www.inf.bme.hu/~mszeredi/spectemu/
Spectrum Emulator A Spanish Spectrum emulator for 48K and 128K. Runs under DOS. http://www.ugr.es/~pedrom/
Spectrum for Java A Spectrum emulator for Java. http://www.guybrush.demon.co.uk/spectrum/index.html
Spectrum Magic Spectrum emulators and games. Play some of the best games of the past and compete to get on the Hi-Score table. http://spectrummagic.emuunlim.com/
The Spectrum Tape Reader A program for any win32 OS and a sound card that reads Spectrum tapes into emulator formats. http://jgibart.club.fr/stl200/stl200.html
The Spectrum Zone "Some friends asked me to put my speccy emulator on the Web, so here it comes." http://www.geocities.com/SiliconValley/Lakes/6350/spectrum.htm
TapeFIX PC program that recovers old and damaged ZX Spectrum tapes. http://fly.cc.fer.hr/~arsen/tapefix/
Warajevo Freeware emulator for DOS. http://www.worldofspectrum.org/warajevo/
X128 A freeware 48, 128, +2, +2A, +3, Pentagon, and Scorpion emulator for DOS. Also available is an older open source Unix port. http://www.worldofspectrum.org/x128/
XZX A shareware ZX Spectrum 48K/128K/+3 emulator for Linux/i386 and Unix. http://www.erik-kunze.de/xzx/
ZX Planet Emulator site for the ZX Spectrum. Has a large collection of emulators, games and utilities. http://zxplanet.emuunlim.com
ZX Plus Sinclair ZX Spectrum 48K and 128K emulator written for Windows 95 / 98 using Direct X. http://www.emuunlim.com/zxplus/
ZX-Emul A freeware emulator for Windows. http://lion17home.narod.ru/
ZXemul Freeware ZX Spectrum emulator for Psion 3 series. http://freeman.web2001.cz/psion/zxemul.php
ZXSP ZX Spectrum emulator for all PowerMac and Linux with X11 windows system. http://little-bat.de/zxsp.html
ZXSpectr An open source 16K/48K/128K/+2/+2A/Inves Spectrum + emulator for DOS. http://sourceforge.net/projects/zxspectr/
ZXSP-Mac A Sinclair ZX Spectrum emulator for the Macintosh. http://k1.dyndns.org/www/little-bat.de/zxsp/download/zxsp_mac/zxsp_mac.html
ZZ Spectrum 16/48/128K Spectrum emulator written in Java. http://home20.inet.tele.dk/tron/spectrum/