Lxdream Emulator

Lxdream is a Sega Dreamcast Emulator for Linux and Mac OS X.

Yabause Emulator

Yabause is a Sega Saturn emulator under GNU GPL. It currently runs on FreeBSD, GNU/Linux, Mac OS X, Windows, Dreamcast, PSP and Wii. Yabause support booting games using Saturn cds or iso files.

Genesis Plus Emulator

Genesis Plus is a Sega Mega Drive emulator written by Charles MacDonald. The emulator emulates all sound channels, and has support for six button Genesis game pads, and support for both BIN and SMD format ROM images.

Genesis Plus focuses on a high level of accuracy in its emulation over the addition of features. As a result, Genesis Plus is one of the most accurate Sega Genesis emulators available, as it maintains a level of accuracy even to a point where problems exhibited on the original hardware will be exhibited in the emulator as well. The only other Sega Genesis emulator that has such a level of emulation accuracy is Kega Fusion.
The Sega Dreamcast port was the first Sega Genesis emulator on the Dreamcast to achieve nearly full speed emulation with proper sound, surpassing even Sega's own emulator in Sega Smash Pack Vol. 1. To this date, it is still the only Sega Genesis emulator on the Dreamcast to hold that distinction.

Fusion Emulator

Kega Fusion (also known simply as Fusion) is a Sega Mega Drive/Genesis emulator by Steve Snake and the third and final emulator of the Kega-series. It also emulates the Mega CD, Sega 32X, Sega Game Gear, Sega Master System, SG-1000 and SC-3000. It runs only on Microsoft Windows Systems, Mac OS X and Linux. Kega Fusion is based on the earlier (and now discontinued) Kega and its successor Kega Lazarus.

SMS Plus Emulator

SMS Plus is an open-source Sega Master System and Game Gear emulator for DOS and Windows, written by Charles MacDonald. It has been ported to a variety of other platforms. The last version was released on 11 February 2007.

Jpcsp Emulator

Jpcsp is the most advanced PlayStation Portable emulator, allowing you to easily play your PSP games on a PC. Even though Jpcsp is written in Java, it can already reach 100% PSP speed on a lot of commercial games and the emulator performance is constantly increasing.

PPSSPP Emulator

PPSSPP is a PSP emulator written in C++, and translates PSP CPU instructions directly into optimized x86, x64 and ARM machine code, using JIT recompilers (dynarecs).
PPSSPP can thus run on quite low-spec hardware, including stronger ARM-based phones and tablets, as long as there's support for OpenGL ES 2.0.

PCSX2 Emulator

PCSX2 is a PlayStation 2 emulator for Windows and Linux, started by the same team that brought you PCSX (a Sony PlayStation 1 emulator that had great success).

PCSX-Reloaded Emulator

PCSX-Reloaded is a PlayStation Emulator based on PCSX-df 1.9, with support for Windows, GNU/Linux and Mac OS X as well as many bugfixes and improvements.

FlareStorm Emulator

FlareStorm is a Playstation emulator for Macintosh.There is no readme file and it no longer requires the PSX BIOS to run.

Bsnes Emulator

bsnes previuosly know as higan, is a free Nintendo multi-system emulator for Microsoft Windows and GNU/Linux which aims to emulate the original SNES hardware as accurately as possible.

Snes9x Emulator

Snes9x is an SNES emulator written in C++ with official ports for GNU/Linux, Microsoft Windows, Mac OS X, iOS, PSP, and Android.

ZSNES Emulator

ZSNES is a free software SNES emulator written mostly in x86 assembly with official ports for Linux, DOS, Mac OS X, Windows, and an unofficial port for Xbox.

Rockness Emulator

This software is a Nintendo Entertainment System 8-bit (NES) emulator. This is the Windows version for the original RockNES developed for DOS (by fx3).

Nestopia Emulator

Nestopia is an open source NES/Famicom emulator designed to emulate the NES hardware as accurately as possible. Originally for Windows only, Nestopia has been ported to the Mac OS X and Linux operating systems.

Dolphin Emulator

Dolphin is a Gamecube and Wii emulator. Most games run perfectly or with minor bugs. Games are playable at HD quality, with 1080p and more. This is a remarkable feature the actual Gamecube and Wii consoles are not capable of. Dolphin is a multiplatform project and many operating systems are supported. Dolphin runs on Windows 7 (x86 and x64), Mac OSX and Linux.

DeSmuME Emulator

DeSmuME (formerly known as YopYop DS) is a Free/Open source Nintendo DS emulator for Linux, Mac OS and Windows. Its name is derived from emu (which is short for emulator), DS and ME.

Sixtyforce Emulator

sixtyforce is an emulator that runs Nintendo 64 games. It does this by dynamically translating the code that a Nintendo 64 uses into something your Mac understands. Nearly every part of a Nintendo 64 has been painstakingly recreated entirely out of software to pull off such an amazing feat. Download sixtyforce and try it yourself!

Mupen 64 Emulator

Mupen64 is a n64 emulator desgined to be multi-OS. It has been developped on/for Linux originally but the emulator has already been ported succesfully on Windows and MacOSX for example. Actually the program can be easily ported on all OS supported by the SDL library.

KiGB Emulator

KiGB - the most accurate and free portable emulator for Gameboy, Gameboy Color and Super Gameboy for Windows, Linux and MS-DOS.