sypherce

Nestopia is an open source NES/Famicom emulator written in standard C++, focused on delivering as accurate emulation as possible. Development began in mid 2002, initially released for the Windows platform a year later. It has since been ported to other platforms, including Linux and Mac OS X.

Jnes is a NES emulator for Windows and Android platforms.
 
Its emulation capabilities include graphics, sound, controllers, zapper, and many memory mapping boards found in most USA games and a few popular Japanese boards adding international delight. Jnes boasts an intuitive user interface with instant saves and movie recording to making playing NES games more enjoyable. One of the coolest features is the included database of Pro-Action-Replay and Game Genie cheats, courtesy of Gent.
 
Jnes supports Kaillera for online gaming. There is also a forum at Emutalk for talking about Jnes with a larger community of users.

Nintendulator started out as NinthStar NES, written by David "Akilla"
De Regt. Written in C++, it was a reasonably accurate (and slow) NES
emulator which used NESten 0.61's mapper DLLs. Numerous other systems
were planned to be emulated within NinthStar (as well as complex
debuggers for each of them), but somewhere along the line, the project
was abandoned.
 
At that point, I took the existing NES sources and started improving
them. First, the PPU was rewritten to be much more accurate than
before, running cycle-by-cycle according to documentation that had been
released at the time. After that, the CPU was rewritten to execute
instructions more accurately. Then the APU was mostly completed, giving
the emulator proper sound. Somewhere along the line, it was determined
that the C++ usage in the code was very poorly done and was slowing the
program down, so I converted it to plain C and named the program
"Nintendulator".
 
The eventual goal of Nintendulator is to be *the* most accurate NES
emulator, right down to the hardware quirks. In the meanwhile, it can
certainly be used to test NES code with confidence that if it works
properly in Nintendulator, it will probably work properly on the real
hardware as well.

This is the Windows release! For Linux or DOS, please visit the official website.
 
ZSNES is a SNES emulator that has been worked on since 1997. Originally
programmed by zsKnight and _Demo_, the project has since then attracted a number
of new developers and contributors.
 
On April 2, 2001, the ZSNES project was GPL'ed and its source released to the
public. Written in a mixture of x86 assembler, C, and C++, ZSNES currently runs
on Windows, DOS, x86 versions of Linux and FreeBSD, x86 Macintosh computers, and
the Microsoft Xbox.

Snes9x is a portable, freeware Super Nintendo Entertainment System (SNES)
emulator. It basically allows you to play most games designed for the SNES and
Super Famicom Nintendo game systems on your Mac, Linux, Windows and so on. The
games include some real gems that were only ever released in Japan.

The original Snes9x project was founded by Gary flockon and Jerremy Koot as a
collaboration of their earlier attempts at SNES emulation (Snes96 and Snes97.)
Over the years the project has grown and has collected some of the greatest
talent in the emulation community (at least of the SNES variety) some of which
have been listed in the credits section, others have helped but have been loss
in the course of time.

Snes9x is a portable, freeware Super Nintendo Entertainment System (SNES)
emulator. It basically allows you to play most games designed for the SNES and
Super Famicom Nintendo game systems on your Mac, Linux, Windows and so on. The
games include some real gems that were only ever released in Japan.
 
The original Snes9x project was founded by Gary flockon and Jerremy Koot as a
collaboration of their earlier attempts at SNES emulation (Snes96 and Snes97.)
Over the years the project has grown and has collected some of the greatest
talent in the emulation community (at least of the SNES variety) some of which
have been listed in the credits section, others have helped but have been loss
in the course of time.

This is the Windows release! For Linux or Mac, please visit the official website.
 
Mupen64Plus is a cross-platform plugin-based N64 emulator which is capable of accurately playing many games. Included are four MIPS R4300CPU emulators, with dynamic recompilers for 32-bit x86 and 64-bit amd64 systems, and necessary plugins for audio, graphical rendering (RDP), signal co-processor (RSP), and input. There is 1 included OpenGL video plugin, called RiceVideo. There are 3 other excellent video plugins being maintained by wahrhaft, called Arachnoid, Glide64, and Z64.