ZX Spectrum

Mac Spectacle - A Sinclair ZX Spectrum emulator for the Macintosh.
http://little-bat.de/zxsp/download/mac_spectacle/manual.html

XZX - A shareware ZX Spectrum 48K/128K/+3 emulator for Linux/i386 and Unix.
http://www.erik-kunze.de/xzx/

Glukalka - An open source 128K emulator for Linux.
http://glukalka.sourceforge.net/

Nuclear ZX - Emulates Sinclair ZX Spectrum 48K on IBM PC.
http://melkor.dnp.fmph.uniba.sk/~garabik/zx.html

Spec128 - Freeware Spectrum 128 emulator for the Acorn Archimedes.
http://joekelleher.tripod.com/Spec128/

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

Warajevo - Freeware emulator for DOS.
http://www.worldofspectrum.org/warajevo/

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

ZXemul - Freeware ZX Spectrum emulator for Psion 3 series.
http://freeman.web2001.cz/psion/zxemul.html

The Spectrum Tape Loader - A Win32 to convert real tapes to .tap or .tzx files.
http://jgibart.club.fr/spectl/spectl.html

ZX Plus - Sinclair ZX Spectrum 48K and 128K emulator written for Windows 95 / 98 using Direct X.
http://www.emuunlim.com/zxplus/

ZXSP - ZX Spectrum emulator for all PowerMac and Linux with X11 windows system.
http://little-bat.de/zxsp.html

ASpectrum - An open source 48k emulator for DOS, Linux, and Windows.
http://sourceforge.net/projects/aspectrum/

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/

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

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

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

ZX Spectrum Emulator Home - ZX Spectrum Emulator for Windows 95 (zx32) Home
http://www.geocities.com/SiliconValley/Bay/9932/

DSP - An open source emulator designed in Delphi 6.
http://leniad.cjb.net/

JX-Speccy - A ZX-Spectrum 48K emulator written in Java.
http://www.ciunga.it/jxspeccy/

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/

Amiga Spectrum Utilities - Emulators, converters and other utilities for handling ZX Spectrum using Amiga.
http://newton.sunderland.ac.uk/~specfreak/amispecutils.html

FooN - Spectrum Emulator for the GameBoy Advance - Freeware Spectrum emulator for the GameBoy Advance.
http://foon.pocketheaven.com/

Fuse - Open source 48K/128K/+2 emulator for Mac OS X, Unix, and Windows.
http://fuse-emulator.sourceforge.net/

Spectemu - A Sinclair ZX Spectrum emulator for Linux/UNIX
http://www.inf.bme.hu/~mszeredi/spectemu/

ZZ Spectrum - 16/48/128K Spectrum emulator written in Java.
http://home20.inet.tele.dk/tron/spectrum/

The Sinclair ZX Spectrum - Emulators, games, and information.
http://www.cryptacet.com/spectrum/

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/

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

Speccy.F9 - Emulators and games.
http://fourleggedostrich.com/speccy

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/

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

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

PocketClive - Emulates ZX Spectrum 48k and 128k on PocketPC.
http://pocketclive.emuunlim.com/

Spectrum for Java - A Spectrum emulator for Java.
http://www.guybrush.demon.co.uk/spectrum/index.html

ZXSpectr - An open source 16K/48K/128K/+2/+2A/Inves Spectrum + emulator for DOS.
http://sourceforge.net/projects/zxspectr/

TapeFIX - PC program that recovers old and damaged ZX Spectrum tapes.
http://fly.cc.fer.hr/~arsen/tapefix/

PsiXZX - A port of the XZX ZX Spectrum Emulator to the EPOC 16 platform.
http://www.gumbley.me.uk/psixzx.html

ZX-Emul - A freeware emulator for Windows.
http://lion17home.narod.ru/

Jontydog's Spectrum Emulation Station - Emulators and games for download.
http://homepage.ntlworld.com/jontydog/

Spectrum Emulator - A Spanish Spectrum emulator for 48K and 128K. Runs under DOS.
http://www.ugr.es/~pedrom/

EmuZWin - A freeware 48 and 128 emulator for Windows.
http://kolmck.net/apps/EmuZWin_Eng.htm

Unnamed ZX Spectrum Emulator for DOS/Linux - 48kb and 128kb/+2 ZX Spectrum emulation.
http://www.btinternet.com/~t.harte/SoftySoft/prevproj.htm

Spectaculator - A commercial emulator for Windows.
http://www.spectaculator.com/

ZX Planet - Emulator site for the ZX Spectrum. Has a large collection of emulators, games and utilities.
http://zxplanet.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

ASp - A freeware 48K/128K/+2 emulator for the Amiga.
http://www.lasernet.plus.com/asp.html