Emulators

A/NES CGFX - http://hem.passagen.se/anescgfx/
A freeware emulator for Amiga.

BeNES - http://www.kk.iij4u.or.jp/~mkt/benes/
A Famicom Emulator for BeOS R4.

CoolNESs Homepage - http://hem.passagen.se/flubba/coolness.html
A fast shareware emulator for the Amiga. Also features a NSF player.

EmilNES - http://sourceforge.net/projects/emilnes/
An open source emulator for Linux and Windows.

FakeNES - http://fakenes.sourceforge.net/
An open source emulator for DOS, Linux, and Windows.

FCE Ultra - http://fceultra.sourceforge.net/
An open source emulator for Linux and Windows.

FrNES - http://members.shaw.ca/ReGex/FrNES.html
A freeware emulator for Dreamcast.

G-NES - http://gigo.retrogames.com/
Freeware emulator for Windows.

imbNES - http://imbnes.gamebase.ca/
A freeware emulator for PlayStation.

iNES - http://fms.komkon.org/iNES/

InfoNES - http://www.geocities.co.jp/SiliconValley/5604/
Homepage of an NES Emulator for Win32. In Japanese but a link to machine translated site in English is available.

Jnes - http://www.jabosoft.com/jnes/
Freeware emulator for Windows/DirectX.

MarioNES - http://mariones.emuxhaven.net/
A freeware emulator for Windows.

Nemus - http://sourceforge.net/projects/nemus/
An open source emulator for Windows.

NESCafe - http://www.davieboy.net/nescafe/
An open source emulator for Java.

Nessie - http://nessie.emubase.de/
An open source emulator for Windows.

NESten - http://tnse.zophar.net
A fast NES emulator for Windows

nester - http://nester.dranalli.com
An open source emulator for Win32/DirectX.

nesterJ - http://www.dcn.ne.jp/~otim2/nesterj/en/dl.html
An open source emulator for Windows based on nester.

NESticle - http://bloodlust.zophar.net/NESticle/nes.html
An old freeware emulator for DOS and Windows.

NESticle Shrine - http://www.zophar.net/NESticle/
Dedicated to the emulator NESticle.

Nestopia - http://sourceforge.net/projects/nestopia/
An open source emulator for Windows.

Nestopia/Mac - http://www.bannister.org/software/nestopia.htm
A MacOS X port of Nestopia by Richard Bannister.

NEStron - http://nestron.emuunlim.com/
A freeware emulator for Windows.

NEZulator - http://members.tripod.com/~nezulator/
An open source emulator for DOS written in Assembler and Pascal.

Nintendulator - http://sourceforge.net/projects/nintendulator/
An open source emulator for Windows.

olafnes - http://olaf.efewe.com/
An open source emulator for Windows based on basicNES 2000.

oldNES - http://sourceforge.net/projects/oldnes/
An open source emulator for Linux/KDE and Windows using SDL.

PocketNES - http://pocketnes.retrogames.com/
A freeware emulator for PocketPC.

Reminesce - http://sourceforge.net/projects/reminesceemu/
An open source emulator for Windows.

RockNES - http://rocknes.kinox.org/
A freeware emulator for DOS, Linux/i386, MacOS, and Windows.

Sega Li - http://home.planet.nl/~haps/
An open source emulator for Windows.

shatbox - http://shatbox.baisoku.org/
An open source emulator for DOS and Windows.

UberNES - http://www.ubernes.com/
A freeware emulator for Windows. The Source Code of the emulation core is also available.

uNESsential - http://www.emucamp.com/unessential/
A novelty NES emulator written in QBasic.

unofficial nester - http://www.emulation9.com/takeda/
Unofficial and improved version of nester.

VirtuaNES - http://virtuanes.s1.xrea.com/
An open source emulator for Windows.

vNes - http://www.vampent.com/emu.htm
Supports Symbian and J2ME, commercial.