Lxdream Emulator

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

Semu Emulator

A rather basic emulator for Unix, has a few of the important features of the real Saturn, but development is moving fast.

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.

RetroCopy Emulator

With RetroCopy you can play your favourite Mega Drive or Genesis games on your PC, Laptop or Notebook. With an easy to use 3D interface and accurate emulation RetroCopy is the best Sega Mega Drive emulator you can download.

Gens Emulator

Gens is a free Sega Genesis emulator. It runs on Windows systems (using DirectX), on GNU/Linux (using SDL) and on Microsoft's Xbox. A port to the Sega Dreamcast, known as Gens4All, is currently in development. Development of Gens began in 1999. As of July 2006, the current version (2.14) advertises full compatibility with 100% of all Genesis games and is considered to be one of the most compatible Genesis emulators available, although its Yamaha YM2612 emulation is far from perfect.

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.

MEKA Emulator

MEKA is a multi-machine emulator for MS-Windows and GNU/Linux (older versions support MS-DOS).

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).

pSX Emulator

pSX, a freeware PlayStation emulator for the Microsoft Windows and Linux operating systems.This emulator fully emulates the Sony Playstation. Compatibility is fairly high.

If you get an error message saying d3dx9_26.dll is missing you can try downloading it from here

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.

ePSXe Emulator

ePSXe (enhanced PSX emulator) is a PlayStation emulator for x86-based PC hardware with Microsoft Windows or Linux, and now on the Android. It was written by three authors, using the aliases "Calb", "_Demo_", and "Galtor". ePSXe is closed source with the exception of the application programming interface (API) for its plug-ins.

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.

FCEUX Emulator

FCEUX is a Nintendo Entertainment System (NES), Famicom, and Famicom Disk System (FDS) emulator. It supports both PAL (European) and NTSC (USA/JPN) modes. It supports both Windows and SDL versions for cross compatibility.

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.