EmuNations

Ares (Near/Byuu's last project) has been continued by new developers (including Luke from Cxbx-r)..! With that in mind,  it's a multi-system emulator focusing mainly on accuracy and some of its exhaustive features include but are not limited to native multi-platform UI adaptive sync, dynamic rate control, save states, run-ahead, rewind or fast-forward and much more..!

Current supported systems

• Famicom + Famicom Disk System

• Super Famicom + Super Game Boy

• Nintendo 64 (Parallel-RDP port)

• Game Boy + Game Boy Color

• Game Boy Advance + Game Boy Player

• Master System + Game Gear

• Mega Drive + Mega CD

• SG-1000 + SC-3000

• PC Engine + PC Engine CD + SuperGrafx

• PlayStation One

• MSX + MSX2

• ColecoVision

• Neo Geo Pocket + Neo Geo Pocket Color

• WonderSwan + WonderSwan Color + SwanCrystal + Pocket Challenge V2

WinArcadia is a multi-system emulator for the following machines::

• Emerson Arcadia 2001 console family (Bandai, Emerson, Grandstand, Intervision, Leisure-Vision, Leonardo, MPT-03, Ormatu, Palladium, Poppy, Robdajet, Tele-Fever, Tempest, Tryom, Tunix...) (1982)

• Interton VC 4000 console family (Acetronic, Fountain, Hanimex, Interton, Prinztronic, Radofin, Rowtron, Voltmace, Waddingtons...) (c. 1978)

• Elektor TV Games Computer (1979)

• PIPBUG- and  BINBUG-based machines (Electronics Australia 77up2 and 78up5, Signetics Adaptable Board Computer, Eurocard 2650...) (c. 1977-1978)

• Signetics Instructor 50 trainer (1978)

• Central Data 2650 computer (1977)

• Astro Wars, Galaxia, Laser Battle and Lazarian coin-ops by Zaccaria (1979-1981)

• Malzak 1 and 2 coin-ops by Kitronix (c. 1980) 

• Chaos 2 computer (1983)

• Dolphin trainer (1977)

• PHUNSY computer (c. 1980) 

• AY-3-8550/8600-based Pong systems (Coleco Telstar Galaxy, Sheen TVG-201...) (c. 1976-1977)

• Ravensburger Selbstbaucomputer aka 2650 Minimal Computer trainer (1984) 

• MIKIT 2650 trainer (1978) 

• VTech Type-right machine (1985)

Features include ReAction GUI, load/save snapshots, windowed and full-screen modes, CPU tracing, trainer, drag and drop support, graphics scaling, automatic load/save of configuration/game, keyboard/joystick/ gamepad/paddle/mouse/trackball support, autofire, turbo mode, gameplay recording/playback, PAL/NTSC modes, sprite demultiplexing, help windows, source code, debugger, frame skipping, redefinable keys, save screenshots (4 supported formats), ARexx port, network play, real-time monitor, locale support, game selection sidebar, text-to-speech, printer output, undithering, support for ZIPped games, clipboard support, palette editor, tone retuning, high score management, force feedback, sprite editor, 3D.

Steam Rom Manager is a bulk game importer and artwork manager for Steam. It's basically an app for managing ROMs and benefiting from what Steam has to provide. This includes using big picture mode, its overlay, controller management layout,  streaming options and much more..

OxyROMon is a cross-platform opinionated CLI ROM organizer written in Rust. Like most ROM managers, it checks ROM files against known good databases. It is designed with archiving in mind, as such it only supports original and lossless ROM formats. Sorting can be done in regions mode, in so-called 1G1R mode, or both. Please check Git for more details.

Wine (Wine Is Not an Emulator) is a compatibility-layer capable of running Windows applications on several POSIX-compliant systems such as Linux, macOS & BSD.

Instead of simulating internal Windows logic like a virtual machine, Wine translates Windows API-calls into POSIX-calls on-the-fly, thus eliminating performance and memory penalties and allowing you to cleanly integrate Windows applications into your desktop.

Wine (Wine Is Not an Emulator) is a compatibility-layer capable of running Windows applications on several POSIX-compliant systems such as Linux, macOS & BSD.

Instead of simulating internal Windows logic like a virtual machine, Wine translates Windows API-calls into POSIX-calls on-the-fly, thus eliminating performance and memory penalties and allowing you to cleanly integrate Windows applications into your desktop.

WineD3D For Windows is a DirectX 1-11 to OpenGL wrapper with almost full implementation of DirectX used in Wine. Even if Windows supports DirectX natively, using WineD3D can enhance backwards compatibility with older games, especially on Windows 8+ that don't support 16-bit screen modes. Others possible values include eliminating unsupported versions of DirectX, or porting DirectX applications to OpenGL without having to rewrite the rendering code. That said, it's far from perfect... 

EmulationStation Desktop Edition is an open source frontend application for browsing and launching games from your multi-platform game collection. It comes preconfigured for use with RetroArch and a number of other emulators. It's also fully customizable so you can expand it to launch other emulators or applications. It has several features such as minimal setup, full controller support, very customizable, Built-in scraper for downloading game info and game media, fully themeable and much more...

Playnite is an open source video game library manager with support for 3rd party libraries like Steam, GOG, Origin, Battle.net and Uplay. While providing one unified interface for your games, it includes game emulation support, fullscreen mode, themes and much more.

Requires Windows 7+ and .NET Framework 4.6 

DOSBox-X is a free and cross-platform DOS emulator for running DOS games and programs. Started as a fork of the DOSBox project, it retains compatibility with the wide base of DOS games and DOS gaming DOSBox was designed for. But it's also a platform for running DOS applications, including emulating the environments to run Windows 3.x, 9x and ME and software written for those versions of Windows. DOSBox-X aims to be a complete DOS emulation package that is both fully-featured and easy to use, covering all pre-2000 DOS and Windows 9x based system scenarios. 

While they have made efforts to maintain and improve the emulation accuracy of the hardware and many more ways to configure the DOS virtual machine, they also try to strike a balance between emulation quality, speed, and usability, including improving the out-of-the-box experience for new users who want to run DOS programs or games, as well as implementing emulation that is accurate enough to make retro-programming possible with confidence the program will run properly on actual hardware.

DSP is an open-source emulator which emulates multiple arcade machines, Spectrum, Phoenix, CPC, Colecovision and more..

Lakka is a lightweight a open-source Linux distribution that converts small computers into full blown retrogaming consoles. It's also the official Linux distribution of RetroArch and is able to emulate a wide variety of systems and has some useful features such as automatic joypad recognition, rewinding, netplay, and shaders.