Open Source Emulators

VICE is an emulator collection which emulates the C64, the C64-DTV, the C128, the VIC20, practically all PET models, the PLUS4 and the CBM-II (aka C610). It runs on Unix, MS-DOS, Win32, OS/2, Acorn RISC OS, BeOS, QNX 6.x, Amiga, GP2X or Mac OS X machines.

ZSNES is a SNES/Super Famicom emulator for x86 computers. It runs on Windows, MS-DOS and Linux/FreeBSD and supports mode 7, sound, Super FX, and a lot more.

The Free Unix Spectrum Emulator (Fuse): an emulator of the 1980s home computer and various clones for Unix, Mac OS X and Windows.

Moved to https://atari800.github.io/

An emulator for Gameboy and GameboyAdvance systems.

VirtualBox is a powerful open-source full virtualization software that allows a user to run one or more “guest” operating systems simultaneously inside “virtual machines” on a single physical “host” machine. It supports a wide variety of host platforms (Linux, Windows, macOS, Solaris, etc.) and guest OSes, enabling, for example, running Linux on a Windows PC, running Windows Server on a Linux host, or even legacy OSes in a controlled environment. This flexibility makes VirtualBox ideal for developers, testers, sysadmins, or hobbyists who need different OS environments, want to test software across systems, or need isolation for development, sandboxing, or security experiments. VirtualBox offers both a user-friendly GUI as well as a command-line interface and headless mode, making it useful for desktop usage as well as server or automated environments.

The continuing development of the legendary VBA gameboy advance emulator.

RetroArch is a way to run classic games on a wide assortment of Operating Systems and Consoles. Support the Developers on their Patron! https://www.patreon.com/libretro

PearPC is an architecture independent PowerPC platform emulator capable of running most PowerPC operating systems. It includes a JITC for x86-Processors.

uCON64 is a tool to backup all kinds of video games. It supports almost every available backup unit for cartridge-based consoles and performs many other tasks like ROM hacking.

Apple Disk Transfer ProDOS (ADTPro) transfers classic 8-bit Apple disk images over a serial, ethernet or audio link to a more modern computer. Based on the seminal ADT, ADTPro can transfer any ProDOS- or SOS-visible volume.

A MAME and MESS port with an advanced video support for Arcade Monitors, TVs, and PC Monitors. It also contains a bootable Linux LiveCD/USB, a frontend with animated MNG/MP3 snapshots, a rom manager, and recompression utilities for compressed files.

SIMH is a highly portable, multi-system simulator. This was a CVS source code server for the project. It has not been updated, and SourceForge does not have commit access to CVS anymore. Please see the new project here: https://github.com/open-simh/simh

O2EM is an open source multi-platform Odyssey2 / Videopac+ emulator. The Odyssey2 (Videopac/Jopac in Europe) was a video game console created in the late 70s.

Valhala Honeypot is an easy to use honeypot for the Windows System. The software have the following services: http (web), ftp, tftp, finger, pop3, smtp, echo, daytime, telnet and port forwarding. Some services are real, others are a simulation.

Teo is an emulator of the Thomson TO8 microcomputer for PC, running on MSDOS, Windows and Linux. The compatibility is close to 100% for softwares which don't use non emulated peripherals and don't hold physical protections. In other words, if a software doesn't work on Teo, so probably : 1. it needs the presence of another peripheral than mouse, light-pen, joystick, tape recorder and disks (so it won't run as long as this peripheral is not emulated), 2. its physical protection makes it fail.

z390 Portable Mainframe Assembler and Emulator

The Psx Emulation Open Source project (P.E.Op.S.) contains several open source libraries (plugins) for freeware MSWindows and Linux psx/ps2 emulators.

Kigen is a RetroArch-based multi-emulator that allows emulating the Sega Master System, GameGear, Genesis, SegaCD, 32X, Sega Saturn and now Arcade using various libretro cores and supports advanced shaders such as color-duplicator2.

FakeNES is a highly portable, Open Source NES and Famicom emulator. It runs on all modern operating systems and has an actively maintained DOS port for enthusiasts. Support for phones and other mobile platforms is under development. The majority of the project is entirely original code released under the zlib/libpng license. Contributed and third-party code is included under GNU licenses.

zBoy is a multiplatform GameBoy emulator that provides a load/save feature, can perform PCX screenshots either manually or automatically (every few seconds) and emulates an internal battery for ROMs that were designed to use one (this allows to use the internal save option provided by such games, remember highest scores, etc). zBoy supports some additionnal features, too, like intelligent saving of hi-scores for some games that aren't able to save their hi-scores table by themselves because of the lack of a battery-backed RAM on the cartridge, and improving screen's resolution output using graphic algorithms like Scale2x, Scale3x, eagle... Here you can see a comparison between graphic algorithms supported by zBoy. This is also one of the very few GameBoy emulators that provides a 2-gameboys link emulation, which makes it possible to play some games in 2-players mode on a LAN. The emulator is available for Linux, DOS and Windows (but should compile for other systems, too).

A portable emulator for the HP (DEC, Compaq) AlphaServer ES40. The current version is capable of running OpenVMS with some limitations. The goal is to have a drop-in replacement for real ES40's. Emulates the Alpha AXP EV68CB processor and other devices.

Sarien is a portable implementation of the Sierra On-Line Adventure Game Interpreter (AGI), and is able to run games such as Leisure Suit Larry in the Land of the Lounge Lizards and Space Quest I and II.

With TURGEN, you can record your own tapes with software for Atari 8-bit computers, and transfer data from your PC or Mac to your Atari 8-bit computer using your data recorder and a cassette adapter. TURGEN converts digital images of Atari software to the original standard Atari tape records and also various "turbo" systems. You can create WAVE files, tape images, or send the signal directly to the sound card. Tools such as Wizard for files, Tape Side Creator, Dual Track Tape creator and Batch processing allow you to create tapes with convenience

Oricutron is an emulator for the Oric series of computers, and the Pravetz 8D. It is written in plain C, and uses SDL. It is designed to be portable.