EmuNations

QEMU is an open source machine emulator and virtualizer.
When used as a machine emulator, QEMU can run OSes and programs made for one machine (e.g. an ARM board) on a different machine (e.g. your own PC). By using dynamic translation, it achieves very good performance. 

MedGui Reborn is a Windows Front-End/Gui for Mednafen multi-system emulator. It features a modern "Metro" style by MetroMed GUI appendix, scanning of rom with comparization with NoIntro Dats, support for compressed files and multi archive in. rar, .7zip, mount on the fly cd based games in compressed zip/cfs/ciso format by Pismo File Mount, automatic/Manual download of available Game Box Art and much more..!

Ludo is a minimalist frontend  launcher for most non-GL libretro cores and is written in go. It offers certain quality of life features like browsing game collections categorized by system with playlists showing in-game screenshots wrapped in a minimalist design. Also provides contextual menu which give you access to actions including quick save and quick load.

DXVK provides a Vulkan-based translation layer for D3D9, D3D10, D3D11 & D3D12. It can be used on Linux with Wine to allow running 3D apps and games designed for Windows on GNU/Linux systems through Wine...

D8VK: An implementation of Direct3D 8 for DXVK. 

• Check here for me details..

Also, note Vulkan 1.3 is a firm requirement and wine 7.1 or newer.

dgVoodoo is a wrapper for old graphics APIs to run on modern Windows operating systems. Its applied using Direct3D11 with different types of wrapping outputs:

• Hardware rendering at GPU feature level 10.1 (recommended)

• Hardware rendering at GPU feature level 10.0 (there are some restrictions)

• Software rendering through Microsoft WARP renderer

The API's it currently can wrap are:

• Glide 2.11, Glide 2.45, Glide 3.1 and Glide 3.1 Napalm

• DirectX 1-7 (all versions of DirectDraw and Direct3D up to version 7)

• Direct3D 8.1

You also need the 3Dfx splash dlls for Glide if you want 3Dfx splash screen or watermark (shameless plug) through dgVoodoo. 

• 3DfxSplashDlls.zip

You may also need D3DRM.dll (Direct3D Retained mode) for some games and demos. It's not part of the OS since Windows Vista.

• D3DRM.zip

MS-DOS Player is a MS-DOS emulator running on Windows (32/64-bit) command prompt. Its 16-bit MS-DOS compatible commands can be executed on Win32/x64 environments.

It basically inherits the environment variables from the host Windows, and a target command can access the host's file path directly. As such, you can execute 16bit MS-DOS compatible commands on your 64bit Windows in the same sence as you did on 32bit Windows, and you do not need to copy any files to/from a virtual machine (VMware, Virtual PC, XP mode, or others).

Note: This emulator DOES NOT support Win16 execution files. It aims to support character user interface utilities, for example file converters, compilers, assemblers, debuggers, and text editors. For now, doesn't support graphic/sound hardwares nor is intended to support game softwares.

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... 

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.