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.

  • Fully Managed MySQL, PostgreSQL, and SQL Server Icon
    Fully Managed MySQL, PostgreSQL, and SQL Server

    Automatic backups, patching, replication, and failover. Focus on your app, not your database.

    Cloud SQL handles your database ops end to end, so you can focus on your app.
    Try Free
  • AI-powered service management for IT and enterprise teams Icon
    AI-powered service management for IT and enterprise teams

    Enterprise-grade ITSM, for every business

    Give your IT, operations, and business teams the ability to deliver exceptional services—without the complexity. Maximize operational efficiency with refreshingly simple, AI-powered Freshservice.
    Try it Free
  • 1
    The Language Processing Agency provides agents and an agent-oriented infrastructure for developing language processors in .NET. Typical language processors are transformation tools, extraction tools, language interpreters, etc.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    The project implement a framework of modular compilers that allows compile time programming for .NET, Java and other platforms. Languages on this framework are multi-paradigm and can be extended by programming new semantic structures or DSL.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3
    LispSharp is a fully compiled lisp implementation for the .NET Framework. It uses a Lisp dialect similar to ISO Lisp, it has a Command-line toplevel compiler with Read Compile Print Loop.It references any .NET DLL and produces standard .NET assembly.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    Locos is an object oriented framework for building parsers and other language processing tools.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Full-stack observability with actually useful AI | Grafana Cloud Icon
    Full-stack observability with actually useful AI | Grafana Cloud

    Our generous forever free tier includes the full platform, including the AI Assistant, for 3 users with 10k metrics, 50GB logs, and 50GB traces.

    Built on open standards like Prometheus and OpenTelemetry, Grafana Cloud includes Kubernetes Monitoring, Application Observability, Incident Response, plus the AI-powered Grafana Assistant. Get started with our generous free tier today.
    Create free account
  • 5
    The Language of Your Choice (Loyc) project is intended to become a rich set of tools for cross-language interoperability. THE PROJECT HAS MOVED TO GITHUB / LOYC.NET / CORE.LOYC.NET
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    A command-line tool that automates exporting objects (forms, modules, queries, reports, macros) into text files using the SaveAsText function, and exports tables using the TransferText function.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    Compiles mangos updates into three files: Realmd_Updates_Compiled.sql, Mangos_Updates_Compiled.sql, Characters_Updates_Compiled.sql. Saves you applying hundreds of updates individually. Easy windows form interface.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    Mercury is a modern logic/functional programming language. The Mercury system includes a compiler, debugger, libraries, sample code, profilers, etc. Mercury is designed to be the successor of logic programming languages such as Prolog.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    The Minions programming language makes it easy to write performant, highly parallel programs. Minions are especially good at web apps. Minions like the web.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Gemini 3 and 200+ AI Models on One Platform Icon
    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

    Build generative AI apps with Vertex AI. Switch between models without switching platforms.
    Start Free
  • 10
    MixNet is a compiler of Mixal assembly language described in Knuth's "The Art of Computer Programming" for Microsoft.NET framework. MixNet generates .NET executable files. All source code is written in C#.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    DotNet IL generation library built on top of System.Reflection.Emit. Allows nice looking C# IL generation, typechecked opcode parameters and IL block manipulation.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    DoNet Forth implementation.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    Multimethods for .NET: Makes multi-methods available to *any* language that targets .NET - C#, VB.NET, JScript.NET, Managed C++ and the rest! Uses .NET dynamic assemblies and shows how to generate dynamic .NET types and IL at runtime.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    NATIVE is a project aimed at producing a version of the C# language compiler which omits native-code for various OS platforms. NATIVE does not target the CLI or use the CLR.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    This project indents to create a C# compiler with AOP support. Currently NKalore have support for After, Before, Around and Throwing advices. This project is based on Mono C# Compiler.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    The NOAP toolkit provides a collection of utilities to use for slightly more exotic development on the Common Language Infrastructure. NOAP includes a fast ORM, an Objective-C compiler for .NET, and much more. See the Web site for more information.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17

    NaiveLanguageTools

    C# lexer and parser

    NLT is free, open-source C# lexer and GLR parser suite -- which translates to ability to parse ambiguous grammars. Grammar can be defined directly in code or (preferably) in separate file (lex/yacc-like) for included generator. If you understand/guess the meaning of grammar in C#: // scanning lexer.AddStringRule(")", match => SymbolEnum.RPAREN); // parsing prod_builder.AddProduction(SymbolEnum.exp, SymbolEnum.LPAREN, SymbolEnum.exp, SymbolEnum.RPAREN, (_1, e, _3) => (AstNode)e); or grammar in NLT format: // scanning /[A-Za-z_][A-Za-z_0-9]*/ -> IDENTIFIER, IdentifierSymbol.Create($text); // parsing program -> list:namespace_list { new Program(currCoords(), (Namespaces)list) }; you should be able to use it :-). There is Example project included which serves as tutorial.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    NasmSharp is an open source effort to build a x86 assembler written in pure C#. Primarily it is a C# port of well known x86 assembler NASM, written in ANSI C. Involvement of some experienced C# programmers is highly appreciated.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Cross compiler for a dialect of Component Pascal programming language targetting at the Intel 8051-like CPUs (and support tools for such a compiler).
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    Ocean Scheme is an implementation of the Scheme programming language (aiming to be compatible with the upcoming R6RS Standard), whose native platform is the .NET framework (Mono, MS, and DotGNU). Written ground-up in C#.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    A self-created language(OrionsScript) compiler/virtual machine platform aiming to be an easy-to-use script language which can embed dotnet library in and can be highly customized.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    OxyScheme is a compiler for a programming language Scheme intended for use on .NET framework
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    PHP4Mono is a compiler that enables Mono to run PHP code. It translates PHP scripts to Common Intermediate Language (CIL). Like that PHP scripts can be executed as console applications on Mono. You can even build GUIs directly from within a PHP script!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24

    PLCduino

    Open Source PLC based on the arduino platform

    PLCduino is an open hardware alternative for industrial and home automation. It uses the well known ATmega chips as main processor, the same used on Arduino. This means that PLCduino is code-compatible with all arduino sketches.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    PObjects is a C#-like language with integrated support for persistent objects and queries.
    Downloads: 0 This Week
    Last Update:
    See Project
MongoDB Logo MongoDB