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What is RetroArch?RetroArch is a modular multi-system emulator system that is designed to be fast, lightweight, and portable. It has features few other emulators frontends have, such as real-time rewinding and game-aware shading.

ZSNES is a Super Nintendo Entertainment System emulator. Aside from emulation accuracy, many interface features first introduced in ZSNES have been adopted by other emulators. ZSNES interface features include: Smoothing and dynamic image scaling; screenshot capture; state saving; recording ZMV movies; increasing/decreasing game speed; ripping SPC700 sound files; integrated Game Genie\Pro Action Replay\GoldFinger cheat code support, decompression of JMA files; "NetPlay"; and GUI themes.

VisualBoyAdvance (VBA) is a free software (GNU GPL) emulator targeted for the Game Boy, Super Game Boy, Game Boy Color, and Game Boy Advance handheld game consoles sold by Nintendo.

ePSXe (enhanced PSX emulator) is an emulator of the PlayStation video game console for x86-based PC hardware. ePSXe makes use of a plugin system to emulate GPU, SPU, and CD drive functions, similar to the model first introduced in PSEmu Pro.

Project64 is a Nintendo 64 emulator for the Windows platform. It employs a plugin system that allows 3rd party developers to implement their own software. It is an emulator, meaning that the user has the option to run ROM files that can be extracted from a Nintendo 64 game cartridge.

higan was formerly known as bsnes. The project was renamed after becoming a multi-system emulator.

EmulationStation is a graphical and themeable emulator front-end that allows you to access all your favorite games in one place, even without a keyboard!

Kega Fusion is an emulator for the Sega Genesis / Megadrive, Master System, Game Gear, 32x, SegaCD/MegaCD, SVP, Pico, SG-1000, SC-3000, and SF-7000 emulator for Win9x/ME/2000/XP/Vista/Win7, Mac OSX (Intel), and Linux.

Mupen64Plus is a plugin-based N64 emulator for Linux which is capable of accurately playing many games. Included are four MIPS R4300 CPU emulators, with dynamic recompilers for 32-bit x86 and 64-bit amd64 systems, and necessary plugins for audio, graphical rendering (RDP), signal co-processor (RSP), and input. There are 3 OpenGL video plugins included: glN64, RiceVideoLinux, and Glide64.

Nestopia is a NES emulator that was written in C++ and it is perfect for games requiring precise timing since it is very cycle-accurate. With support for an incredible amount of mappers. It also supports NSFs, the famicom disk system, save states, IPS patching, battery-saved ram, NES movie files, and many VS-Unisystem games. Finally, it emulates four non-standard controllers (including the Power Pad).

mGBA is a new Game Boy Advance emulator written in C.

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.

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.