EmuNations

Xbox 360 Controller Emulator allows your controller (gamepad, joystick, wheel, etc.) to function as an Xbox 360 controller. For example, it lets you play games such as "Grand Theft Auto" (GTA) or "Mafia II" using a Logitech Wheel.

DOSBox Staging is an attempt to revitalize DOSBox's development process. It's not a rewrite, but a continuation and improvement on the existing DOSBox codebase while leveraging modern development tools and practices.

For example, they want to improve the out-of-the-box experience for new users, integrate several notable community-developed patches that are not included in the SourceForge-hosted project, implement new features and quality-of-life improvements, prioritize DOS gaming while focusing on supporting up-to-date, current Operating Systems and modern hardware. For technical comparisons, please check here.

Modern fork of x360ce built with SDL3, ViGEmBus, vJoy, Windows MIDI Services, HelixToolkit, .NET 10 WPF, and Fluent Design. Turn any input device into any virtual controller:
Gamepads, joysticks, keyboards, mice, and touchscreens — mapped to Xbox 360, DualShock 4, DirectInput, MIDI, or Keyboard+Mouse output that games treat as real hardware.

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... 

Launchbox is a front-end wrapper for emulators. Not only does it automatically download box art for games, it also grabs fanart, screenshots, logos and more to create an immersive experience via BigBox.

It also supports arranging and filtering by genre, platform, ESRB rating, developer, publisher, genre, etc. It also includes automated import processes for your MS-DOS games, ROM files, and Steam in order to help get you up and running as quickly as possible. Game box-art and metadata can also be automatically downloaded from their Games Database or community-based online databases.

Nostlan (formally Bottlenose) is a high quality front-end launcher for gaming emulators which supports Windows, Linux and MacOs. It's currently capable of launching more mainstream emulators with nice features and its future looks quite bright!

Current Features

• unified UI for mouse/gamepad interaction
• designed for UHD displays and projectors
• checks multiple database sites for the highest quality box art
• nostalgic UI themes for each supported console
• fancy scroll direction alternation effect on rows in cover view mode
• most controllers connect to Bottlenose automatically, no setup required including Xbox One, PS4 Dualshock, and Switch Pro controllers
• gamecube controller adapter supported with gca-js
• advanced customization: edit launch commands and change game art

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. 

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.