The Emulation Scene - Computer Emulation

Multi Emulator Super System
M.E.S.S. - A free emulator which emulates a large variety of different systems

Amiga
The Fellow Project - A windows emulator which is considered very fast

UAE - is a mostly complete software emulation of the hardware of the Commodore Amiga 500/1000/2000. A Commodore Amiga, for those who don't know, is a 16/32 bit computer system based on the Motorola 680x0 CPU and a few specially designed custom chips that provide very good graphics and sound capabilities

DosUAE - DOS port
WinUAE - Windows port
MacUAE - Power Macintosh port
BeUAE - BeOS port


Amstrad
Caprice 32 - Software simulating hardware
CPCE - CPC emulator for DOS
NO$CPC - simply the fastest CPC emulation ever, integrated hi-end debugger with breakpoints, online assembler, various keyboard drivers, popup-menues, full mouse control, supports arj/pkzip archievated DSK-files, full adlib sound support, video mode/color splitting, joystick support, disk copy protection emulation
WinAPE32 - The windows Amstrad Plus Emulator


Apple II
Apple II Oasis for Windows - Emulates 128K+ //e, all video modes, 65c02 and Z80 microprocessors, Apple II speaker, Disk II and Hard disk images, realtime clock, serial interface, peripheral card swapping, etc
Appler - A DOS-hosted Apple ][ Emulator, written entirely in 386 Assembler
XGS/32 - XGS/32 is a windows-based Apple IIgs Emulator, based on the original XGS core


Atari 8bit
Atari800Win - A freeware Atari 8-bit computer emulator for Win9x/NT
Xformer 2000 - Runs your Atari 400/800, 800XL and 130XE for DOS, Windows (9x,NT,2000) and OS/2
Rainbow - Is the Atari 8-Bit Emulator for the Apple Mac and Windows 95/98/NT with Direct X, it offers very faithful emulation both graphics and sound

Atari 16/32bit
Echo - An Atari ST emulator for DOS
Pacifist - One of the best Atari ST emulators for DOS
TosBox - A system-level Atari ST emulator for DOS
Winston - An Atari ST emulator for Windows 9x/NT

Commodore 64
C64S - A commercial emulator for DOS
CCS64 - CCS64 is a Commdore 64 Emulator for PC and also in the future other platforms
Versatile Commodore Emulator (VICE) - Is a Versatile Commodore Emulator, i.e. a program that runs on a Unix, MS-DOS, Win95/NT, OS/2 or RiscOS machine and executes programs intended for the old 8-bit Commodore computers. The current version emulates the C64, the C128 (80 column screen is included now), the VIC20, all the PET models (except the SuperPET 9000, which is out of line anyway) and the CBM-II (aka C610)
Frodo - The free portable C64 emulator for BeOS, Unix, MacOS, AmigaOS, RiscOS, Windows, EPOC
Come Back 64 - Come Back 64 is a software emulator for the Commodore 64 Computer running on various platforms

MSX
BRMSX - BRMSX will be the fastest and most accurate MSX emulator ever. To assure that, BRMSX is all written in 32-bit assembly, there will be not a single line of C code in this emulator
RuMSX - RuMSX is a MSX-emulator for the Win32-platform that emulates the MSX1, MSX2, MSX2+ and the Turbo R
fMSX - Is a portable emulator of MSX/MSX2/MSX2+ home computers, written in C. Because of its portability, fMSX runs on many different systems including Unix, MacOS, AmigaOS, MSDOS, and Windows
NO$MSX - A fast DOS and Windows MSX emulator
RuMSX Turbo-R - A fast Windows 32 emulator

Macintosh
Basilisk - An Open Source 68k Mac emulator for BeOS, Unix, AmigaOS and Windows
ARDI - A commercial emulator for Windows 3.1/9x/NT/2000, DOS and OS
Fusion - A commercial emulator of PCs
VirtualMac - A commercial program running Mac software on Windows
The vMac Project - A emulator that currently emulates a Motorola 68000 based Apple Macintosh Plus on Windows, DOS Unix, OS/2 and NeXT


PC98
Anex86 - A EPSON PC-286/PC-386/PC-486/PC-586 emulator for Windows
PC98E - A PC-98x1 emulator for Linux/x86, FreeBSD and Windows

Spectrum
R80 - A Spectrum 16k, 48k, 128k, +2 ,+2A, Pentagon 128 and Scorpion 256 emulator
Spec256
X128 - A spectrum emulator for DOS
Z80 Stealth - A spectrum emulator
ZX Plus - ZX Plus is a Sinclair ZX Spectrum 48K and 128K emulator written for Windows 95 / 98 using Direct X

Tandy
Tandem - Tandy Personal Computer emulator