Browse free open source C# Compilers and projects below. Use the toggles on the left to filter open source C# Compilers by OS, license, language, programming language, and project status.

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  • 1
    ILSpy

    ILSpy

    .NET Decompiler with support for PDB generation, ReadyToRun, Metadata

    ILSpy is the open-source .NET assembly browser and decompiler. Visual Studio 2022 ships with decompilation support for F12 enabled by default (using our engine v7.1). In Visual Studio 2019, you have to manually enable F12 support. Go to Tools / Options / Text Editor / C# / Advanced and check Enable navigation to decompiled source. C# for Visual Studio Code ships with decompilation support as well. To enable, activate the setting "Enable Decompilation Support. ILSpy is distributed under the MIT License. Please see the About doc for details, as well as third-party notices for included open-source libraries. Visual Studio 16.3 and later include a version of the .NET (Core) SDK that is managed by the Visual Studio installer - once you update, it may get upgraded too. Please note that ILSpy is only compatible with the .NET 6.0 SDK and Visual Studio will refuse to load some projects in the solution.
    Downloads: 350 This Week
    Last Update:
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  • 2
    reko

    reko

    Reko is a binary decompiler

    Reko (Swedish: "decent, obliging") is a decompiler for machine code binaries. This project is freely available under the GNU General Public License. The project consists of front ends, core decompiler engine, and back ends to help it achieve its goals. A command line, a Windows GUI, and a ASP.NET front end exist at the time of writing. The decompiler engine receives inputs from the front ends in the form of either individual executable files or decompiler project files. Reko project files contain additional information about a binary file, helpful to the decompilation process or for formatting the output. The decompiler engine then proceeds to analyze the input binary. Reko has the ambition of supporting decompilation of various processor architectures and executable file formats with minimal user intervention. For a complete list, see the supported binaries page.
    Downloads: 21 This Week
    Last Update:
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  • 3
    Decompiler

    Decompiler

    Binary executable decompiler

    Reko decompiler reads program binaries, decompiles them, infers data types, and emits structured C source code. Designed with a pluggable architecture, it currently has: - support for 68k, ARM, MIPS, PowerPC, Risc-V, Sparc, x86, Z80 processors and many more - support for EXE, Elf, AmigaOS Hunk executable formats and many more - support for MS-DOS, Win32, U*ix, AmigaOS , C64, ZX-81 Reko decompiler comes with a GUI and a command-line interface. Visit https://github.com/uxmal/reko for the GIT repository.
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    Downloads: 138 This Week
    Last Update:
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  • 4
    AvaloniaILSpy

    AvaloniaILSpy

    Avalonia-based .NET Decompiler (port of ILSpy)

    This is a cross-platform version of ILSpy built with Avalonia. Search for types/methods/properties (substring). Hyperlink-based type/method/property navigation. Extensible via MEF Extensibility (Check out TestPlugin folder). Note: This is not compatible with ILSpy Plugins. Grab artifacts from the latest master CI build. This includes Linux, Mac and Windows.
    Downloads: 11 This Week
    Last Update:
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  • 5
    Roslyn

    Roslyn

    The .NET Compiler Platform

    Roslyn provides rich, code analysis APIs to open source C# and Visual Basic compilers. This enables you to access a wealth of information about your code from compilers, which you can then use for code-related tasks in your tools and applications. Roslyn dramatically lowers the barrier to entry for creating code-focused tools and applications, creating many opportunities for innovation.
    Downloads: 8 This Week
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  • 6
    SMC - The State Machine Compiler

    SMC - The State Machine Compiler

    Translates state machine into a target programming language.

    SMC takes a state machine stored in a .sm file and generates a State pattern in 14 programming languages. Includes: default transitions, transition args, transition guards, push/pop transitions and Entry/Exit actions. See User Manual for more info.
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    Downloads: 39 This Week
    Last Update:
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  • 7
    This project has moved to http://wixtoolset.org. The WiX toolset is a set of tools that builds Windows installation packages from text source code. The toolset supports a command line environment that developers may integrate into their build processes to build setup packages for the Windows platform.
    Downloads: 28 This Week
    Last Update:
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  • 8
    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.
    Downloads: 22 This Week
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  • 9
    Dotnet IL Editor (DILE) allows disassembling and debugging .NET 1.0/1.1/2.0/3.0/3.5 applications without source code or .pdb files. It can debug even itself or the assemblies of the .NET Framework on IL level.
    Downloads: 14 This Week
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  • 10
    Liogo is a Logo Compiler for .NET. Liogo compile Logo files to .NET IL EXE or DLL. So, Liogo result could be launched directly on Windows and, via Mono runtime, on Linux. Last, with Liogo you can mix Logo code with C#/VB.NET code.
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    Downloads: 17 This Week
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  • 11
    HydraDragonAntivirus

    HydraDragonAntivirus

    Open Source Antivirus/XDR for Windows operating system

    Dynamic and static analysis with Real Time Malware Analysis with Antivirus for Windows, including open-source XDR (3 EDR projects), ClamAV, YARA-X, machine learning AI, behavioral analysis, Unpacker, Deobfuscator, Decompiler, website signatures, Ghidra, Suricata, Sigma, Kernel, Hypervisior based protection and much more than you can imagine.
    Downloads: 29 This Week
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  • 12
    Compose* is a project that aims at enhancing the modularization capabilities of component- and object-based programming. In particular, Compose* offers aspect-oriented programming through the composition filters model.
    Downloads: 16 This Week
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  • 13
    <HTML> Editor
    <HTML> Editor is a free open source HTML editor from Sheva Software Inc the HTML Editor includes syntax highlighting and a unique feature of a live previewing of current HTML document, check it out, and please wright a review if possible.
    Downloads: 4 This Week
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  • 14
    php2desktop

    php2desktop

    Build Windows desktop applications using PHP, Javascript, CSS & HTML

    php2desktop gives developers the ability to create content rich native Windows GUI applications using web technologies they're familiar with. Zero C language knowledge is necessary, simply copy your web files into the www directory and run by opening the .exe file. In a way, php2desktop is a PHP to exe compiler without the headache of running commands. php2desktop is an out-of-the-box solution that comes pre-built with PHP 8 and a Chromium 114 embedded browser; combine with the power of JavaScript, SQLite, HTML5 & CSS3 and you'll be making native desktop applications as easy as building a web application. Connect to APIs for interactive applications. Use your favourite framework such as Bootstrap or Laravel and change nothing about your workflow ... Your imagination's your only limit.
    Downloads: 7 This Week
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  • 15

    ULS

    A lexical analyzer generator that makes the class source code.

    ULS is a class library for creating lexical analyzer from language specification file. It's provided as C/C++/C# and Java (class) libraries with a few of tools on Linux/Windows platform.
    Downloads: 5 This Week
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  • 16
    Cmajor

    Cmajor

    Cmajor is an experimental programming language.

    Cmajor is an experimental programming language strongly influenced by C++ and C#. It is semantically closer to C++ than C# and syntactically closer to C# than C++.
    Downloads: 4 This Week
    Last Update:
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  • 17
    xacc.ide is a opensource IDE aimed at mainly .NET development. It has a code editor written in 100% C# code, which is faster than most commercial offerings.
    Downloads: 2 This Week
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  • 18

    Android App Decompiler

    Decompile an Android APK

    Android App Decompiler is a useful Tool to unextract and decompiles Android APK. When you runed the Decompiler than created an folder with all Files from then APK and the dex (dalvik executable format) being converted to an jar file. You must only now use an Java Decompiler like jd-gui and you have all files of the App.
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    Downloads: 2 This Week
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  • 19
    Software Studio is an Integrated Development Environment (IDE) for C#, Java, VB.Net, Aspx, C++, Html, Xml, Php, JavaScript, Tex with multi-language support,syntax higlighting,code folding,code completetion,refactoring support
    Downloads: 1 This Week
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  • 20
    Decompiler for 1C Enterprise 7.7
    Downloads: 1 This Week
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  • 21
    DrC# (Dr. C sharp) is an integrated C# development environment that supports interactive evaluation of expressions.
    Downloads: 1 This Week
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  • 22
    Small and lightweight .NET 2.0 library written in C# for quickly evaluating arithmetical expressions using interpretation or runtime MSIL generation.
    Downloads: 1 This Week
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  • 23
    [Project is currently suspended and no longer supported by SP extreme] Open License project goal is to develop a complete .NET License Manager. The purpose is to extend the built in License Manager functionality. Open License is being written in C#.
    Downloads: 1 This Week
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  • 24
    A set of tools relating to an educational processor used in teaching Computer Architecture at the University of Ottawa. Currently includes a working assembler and a semi-functional emulator/debugger.
    Downloads: 1 This Week
    Last Update:
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  • 25
    3DProS is a programming tool. It helps people create 3D animations, design custom 3D controls and solve lots of graphic problems easily, just by drag and drop. Besides a built-in language called MathScript, it also supports Free Pascal and MinGW C++
    Downloads: 0 This Week
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