Games similar to MESS include RetroArch, which is free and open source. Other options are Super ZSNES, Snes9x, ZSNES and VisualBoyAdvance. You're spoiled for choice with Game Emulators like MESS: we list more than 50 alternatives for Windows, Linux, Mac, Android and iPhone.
Gens/GS is a version of Gens maintained by GerbilSoft. The main goal of Gens/GS is to clean up the source code and combine features from various forks of Gens, as well as improving portability to other platforms.
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SheepShaver is a MacOS run-time environment for BeOS and Linux that allows you to run classic MacOS applications inside the BeOS/Linux multitasking environment. This means that both BeOS/Linux and MacOS applications can run at the same time (usually in a window on the BeOS/Linux...
Advanced open-source Sega Genesis/Mega Drive, Sega CD, and Master System/Mark III emulator based on portions of Genesis Plus/Gens/Picodrive/Mednafen, designed and tested on the original Droid/Milestone, Xoom, Galaxy S2, Nexus 4, Nexus 7, NVidia Shield, Xperia Tablet Z, and...
United States
Basilisk II is an Open Source 68k Macintosh emulator. That is, it allows you to run 68k MacOS software on your computer, even if you are using a different operating system. However, you still need a copy of MacOS and a Macintosh ROM image to use Basilisk II.
DroidEmu is a game system to play SNES, NES, GameBoy Advanced, GameBoy/Color, SEGA GameGear, SEGA Genesis games on your Android phone. It runs thousands of games at full speed.
Yabause is a Sega Saturn emulator under the GNU GPL. It currently runs on FreeBSD, GNU/Linux, Mac OS X, Windows, Dreamcast, PSP and Wii.
Jnes is a NES emulator for win32 platforms that uses DirectX for its hardware interface. Its emulation capabilities include graphics, sound, input devices, and emulating quite a few memory mapping boards found in most USA games and a few popular japanese ones.
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SSF is a Sega Saturn emulator for Windows systems using DirectX 9.0c or higher. The current version claims near-complete implementation of the Saturn hardware, and can also emulate the Saturn-based Sega Titan Video arcade hardware.
AppleWin (also known as Apple //e Emulator for Windows) is an open source software emulator for running Apple II programs in Microsoft Windows. AppleWin was originally written by Mike O'Brien in 1994; O'Brien himself announced an early version of the emulator in April...
United States
Provenance is an iOS Frontend for multiple emulators, currently supporting Sega Genesis, Game Gear, Master System and SNES.
United Kingdom
PicoDrive is a Sega Mega Drive/Pico emulator programmed by notaz. It works on windows systems and has the functions that would be expected of a Pico emulator. The pen board is on a separate window but by selecting a certain option the game screen itself can be used as the pen...
Supermodel emulates Sega's Model 3 arcade platform, allowing you to play a number of ground-breaking arcade classics on your PC. It uses OpenGL and the SDL library, and can run on Windows, Linux, and Mac OS X.
