ryu64 - This emulator aims to emulate the Nintendo 64, don't expect much right now, no commercial games work.

project64 - Can play games reading ROM images, either dumped from the read-only memory of a N64 ROM cartridge or created directly on the computer as homebrew.

mupen64plus - A cross-platform plugin-based N64 emulator which is capable of accurately playing many games.

daedalus - Nintendo 64 emulator for Linux and PSP, with plans to port to Windows, Mac, PS Vita among other platforms.

1964js - Nintendo64 emulator in JavaScript.

Dolphin - A GameCube and Wii emulator, allowing you to play games for these two platforms on PC with improvements.

mGBA - Aims to be faster and more accurate than many existing Game Boy Advance emulators.

TGBDual-L - A rebase of changes in libertyernie/tgbdual on top of tgbdual_kai.

It was the first to support link cable emulation (through TCP/IP), later followed by VBA Link and then modern emulators.

TGBDual - A Japanese Game Boy/Game Boy Color emulator.

SameBoy - Game Boy and Game Boy Color emulator written in C.

GearBoy - Game Boy / Gameboy Color emulator for iOS, Mac, Raspberry Pi, Windows, Linux and RetroArch.

Gambatte - Is a work-in-progress and portable Game Boy Color emulator.

Xe - A emulator for many system such as Nintendo, SEGA, SNK, NEC, etc.

Emulates the all SEGA 8-bit and 16-bit consoles.

Genesis-Plus-GX - An enhanced port of Genesis Plus - accurate & portable Sega 8/16 bit emulator.

Mednafen - portable, utilizing OpenGL and SDL, argument(command-line)-driven multi-system emulator.

MAME - A multi-purpose emulation framework.

Higan - Emulates a number of classic video-game consoles of the 1980s and 1990s, allowing you to play classic games on a modern general-purpose computer.

FinalBurn Neo - An emulator for arcade games & select consoles.

Xenia - An open source research project for emulating Xbox 360 games on modern PCs.

CXBX-Reloaded - An emulator for running Microsoft Xbox (and eventually, Chihiro) games on Microsoft Windows.

XQemu - Open-source emulator to play original Xbox games on Windows, macOS, and Linux.

jzIntv - Mattel Intellivision emulator and development environment.

Virtual Jaguar - Virtual Jaguar is an open-source Atari Jaguar emulator.

Handy - 'Handy' is an Atari Lynx Emulator.

ProSystem - ProSystem Emulator Version 1.3 by Greg Stanton.

kat5200 - An emulator for the Atari 5200 and 8-bit computers.

Altirra - Very accurate Atari 8-bit computer (All models) and 5200 console emulator.

atari800 - Atari 8-bit computer and 5200 console emulator.

stella - A multi-platform Atari 2600 VCS emulator which allows you to play all of your favourite Atari 2600 games on your PC.

A curated list of awesome open source emulators.

Playstation 2 emulator for mac os