Open Source C# Emulators

Locale Emulator is a tool similar to AppLocale and NTLEA, providing a simulation function that can make an application recognize your OS as in a language other than the real one. It is quite useful when you are trying to play country-specific games. Locale Emulator is compatible with the following systems, both 32 and 64-bit, Windows 7 with Service Pack 1, Windows 8.1, and Windows 10. Locale Emulator supports 32-bit executables running on both 32-bit or 64-bit systems. For example, if you are using 64-bit WinRAR, you will not see the context menu on a RAR file unless you swapped 64-bit WinRAR with the 32-bit version. Clone the repo using Git, install Microsoft Visual Studio 2015 / 2017, open LocaleEmulator.sln, perform build action, clone and build the core libraries, and copy LoaderDll.dll and LocaleEmulator.dll from Locale-Emulator-Core to Locale-Emulator build folder.

An open-source emulator for the 3DO Game Console.

ASAP (Another Slight Atari Player) plays and converts 8-bit Atari music (*.sap, *.cmc, *.mpt, *.rmt, *.tmc, ...) on modern computers and mobile devices.

IKVM.NET is a JVM for the Microsoft .NET Framework and Mono. It can both dynamically run Java classes and can be used to convert Java jars into .NET assemblies. It also includes a port of the OpenJDK class libraries to .NET.

ProjectPSX is an experimental PlayStation 1 emulator written entirely in C# that focuses on learning and exploring console hardware through a clean and dependency-free implementation. The project emulates key components of the PS1 architecture, including the MIPS R3000A CPU, GPU, DMA controller, and CD-ROM subsystem, all interconnected through a custom bus system. Unlike production-grade emulators, ProjectPSX is intentionally designed as a transparent and educational codebase, prioritizing simplicity and readability over full compatibility or performance optimization. It includes a software-based rasterizer for rendering 3D graphics and supports features such as memory cards, basic BIOS functionality, and controller input mapping. The emulator can run many commercial games to varying degrees, although timing inaccuracies and missing features can still cause instability.

DosBlaster is a DOS game launcher to run DOS games. It requires DOSBOX (http://www.dosbox.com) as a backend to run the game. The users import the games and then run them.

Blizzless DiIiS is an open-source server implementation for Diablo III: Reaper of Souls that allows players to run the game in a fully local or private server environment. It recreates much of the game’s backend infrastructure, including account systems, matchmaking, progression mechanics, and gameplay logic. The project supports a wide range of in-game systems such as character classes, item generation, quests, and multiplayer interactions, aiming to replicate the original online experience without requiring Blizzard’s official servers. It includes features like dungeon generation, artificial intelligence for enemies, and support for both campaign and adventure modes. The server is designed to be deployable locally or over LAN, enabling cooperative play in controlled environments. While still under active development, it already implements a significant portion of the game’s systems, making it one of the most comprehensive private server projects for Diablo III.

An intel 8085 microprocessor emulator.

A free front-end emulator displaying associated game box art image for each game. GameLauncher can be controlled using standard Xbox controller. ROM associated image files can be downloaded using following link: http://axter.com/GameLauncher/Images.zip

V.Dream is a V.Smile emulator developed by Néo Foderé de Frutos under the FODSOFT™ brand and written in C, C#, and XAML. The V.Dream core is based on V.Frown, an emulator originally developed by Ian (Schnert0) and other contributors. With V.Dream, you can play and relive the games from your childhood or discover them for the first time, develop your own software with instructions for the emulated hardware, among other features. It should be noted that neither FODSOFT™ nor V.Dream provide ROMs or any other means that facilitate piracy; the only thing FODSOFT™ offers is software that simulates the hardware of that era so the games can run on modern devices. V.Dream is an independent project of FODSOFT™ and is not affiliated with, endorsed by, or in any way connected to VTech® or any of its subsidiaries or affiliates. V.DREAM DOES NOT ACCEPT DONATIONS. © 2025 FODSOFT™. Néo Foderé de Frutos. All rights reserved.

Tiny8051 is small 8051 microcontroller simulator written in C#. Project was created for educational purposes, to show how µP works by using clean visual interface and debugging. Note: communication over serial port was not implemented, because there was no demand for it.

The Free .NET ZX Spectrum Emulator, written in C#. An emulator of the 1980s home computer and various clones, that can work on various platforms with .NET environment.

Utility to edit CDT files (Amstrad Tape)

Control your mouse cursor from your phone, and you only need your web browser! No additional app required.

Releases by No Name Development. All original code is released under the zlib/libpng License, the source to No Name MAME is released under MAME's own license.

"Slow CPU" Emulator is useful for slowing down games, testing how applications deal with lag, and/or reducing the overall CPU usage of a specified process. Simply tell the emulator the update interval and speed percentage, and witness your application slowing down to the specified speed live! The code is written in C# for Windows and is extremely robust, flexible and stable, and has been tested very thoroughly. I apologise in advance for the code not being very readable, sometimes spaghetti code is more optimised code. ;) If you encounter any issues, do not hesitate to tell me. :) License: MS-PL Do whatever you want with the code. Credit would be nice, but definitely not required. I am not responsible for any undesired or unintended effects that may (most probably won't) come up as a result of using the application.

A 6502 processor simulator/development environment written in C#.

8088 Software Development Environment for the .NET & WIN32 platform. Program and control the windows pc with 8088 ML. Assemble, Disassemble, Emulate 8088 Assembler. Realtime I/O

In this project I'll try to reinvent the wheel by designing the ACPU. In this Project I'll upload the official Emulator, Compiler and Docs -- !!! Anouncment !!! -- Searching Developer for USBSupport and one for OSDev -- !!! Anouncment !!! --

Bartlett is a simplified installer, console, configurator and launcher for the PearPC project (PowerPC Emulator).

BizHawk is a multi-system emulator written in C#. BizHawk provides nice features for casual gamers such as fullscreen, rewind, and joypad support in addition to rerecording and debugging tools for all system cores.

Managed C# Spectrum Emulator

The Cell framework is a scalable server framework written in C#. It's original purpose is for MMOG emulation but can be easily adapted to other areas. The project includes a proof of concept rewrite of the DAoC emulator DOL.

CellAO Datalogging provides the raw data Databases / Scripts / and other Documentation for Emulating Anarchy Online or makeing bots and such.

A Commander clone written in .Net with support for emulator files, mainly aimed at the Commodore 64 enthusiasts, but also intended for general use.