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

  • Stay in Flow. Let Zenflow Handle the Heavy Lifting. Icon
    Stay in Flow. Let Zenflow Handle the Heavy Lifting.

    Your AI engineering control center. Zenflow turns specs into shipped features using parallel agents and multi-repo intelligence.

    Zenflow is your engineering control center, turning specs into shipped features. Parallel agents handle coding, testing, and refactoring with real repo context. Multi-agent workflows remove bottlenecks and automate routine work so developers stay focused and in flow.
    Try free now
  • Auth0 for AI Agents now in GA Icon
    Auth0 for AI Agents now in GA

    Ready to implement AI with confidence (without sacrificing security)?

    Connect your AI agents to apps and data more securely, give users control over the actions AI agents can perform and the data they can access, and enable human confirmation for critical agent actions.
    Start building today
  • 1
    .NET Runtime

    .NET Runtime

    Cross-platform runtime for cloud, mobile, desktop, and IoT apps

    .NET is a free, cross-platform, open source developer platform for building many different types of applications. With .NET, you can use multiple languages, editors, and libraries to build for web, mobile, desktop, games, and IoT. You can write .NET apps in C#, F#, or Visual Basic. C# is a simple, modern, object-oriented, and type-safe programming language. F# is a cross-platform, open-source, functional programming language for .NET. It also includes object-oriented and imperative programming. Visual Basic is an approachable language with a simple syntax for building type-safe, object-oriented apps. Whether you're working in C#, F#, or Visual Basic, your code will run natively on any compatible OS. Different .NET implementations handle the heavy lifting for you.
    Downloads: 31 This Week
    Last Update:
    See Project
  • 2
    CoreCLR

    CoreCLR

    Runtime for .NET Core

    CoreCLR is the runtime for .NET Core, an open source, general purpose development platform maintained by Microsoft and the .NET community. It is a cross-platform runtime for cloud, IoT, and desktop apps and includes a just-in-time compiler called RyuJIT.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 3
    .Net Runtime Library for Delphi

    .Net Runtime Library for Delphi

    This is the best library to work with the .Net framework from Delphi.

    The .Net Runtime Library for Delphi (CNClrLibrary) is the best library to work with .Net framework and .Net libraries from Delphi. It is designed to provide a way to interact with applications written in anyone of the .Net languages (such as C#, Visual Basic.Net, Delphi.Net, JScript.Net, etc) from Delphi. CNClrLibrary allows Delphi to use .Net libraries without the need for registry entries, COM registrations, or changes to the .NET libraries. Competitive Advantages: - No extra dll is required when deployed. - No COM registration of .Net Libraries is required when deployed. - There are tools to generate your .Net Libraries into Delphi pas files. - Allows Delphi to consume .Net libraries as if they were native code. - Full access to .Net Framework Class Library. - Easy to use. CNClrLibrary can do so much: - Access .Net Framework Class Library. - Access Third Party .Net Libraries. - Access Your .Net Libraries. - etc Latest Version: 6.0.7.0
    Leader badge
    Downloads: 9 This Week
    Last Update:
    See Project
  • 4

    .NET Bindings

    .NET runtime bindings for WFMATH

    This project is a subproject of the WFMATH library, a library providing several complex mathematical primitives. This library will allow .NET programmers to use WFMATH in their code.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Grafana: The open and composable observability platform Icon
    Grafana: The open and composable observability platform

    Faster answers, predictable costs, and no lock-in built by the team helping to make observability accessible to anyone.

    Grafana is the open source analytics & monitoring solution for every database.
    Learn More
  • 5

    DatedGuid

    Guid version d.3 has date encoded

    GUID v4 and v5 has abandoned timestamp. this Guid version d.3 has date encoded
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    PeachPie

    PeachPie

    PeachPie, the PHP compiler and runtime for .NET and .NET Core

    PeachPie is a modern PHP compiler based on the Microsoft Roslyn compiler platform and drawing from our popular Phalanger project. It allows PHP to be executed within the .NET framework, thereby opening the door for PHP developers into the world of .NET – and vice versa. Build, debug, profile, and diagnose your code in the family of .NET tools, including Visual Studio and VS Code. Seamlessly port your legacy PHP code to the modern, cross-platform, lightning-fast .NET Core. Leverage the best of both worlds and build .NET apps in C# and PHP. You can find an up-to-date status of the project in our Roadmap section. Please note that the status is dynamic; PeachPie is a work in progress, which means that the list of finished and planned features frequently changes and will be updated on a regular basis.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    dotNet4Java - .Net for Java

    dotNet4Java - .Net for Java

    The best Java library to work with .Net libraries and frameworks.

    The dotNet4Java is a .Net Runtime Library for Java which helps Java developers work with .Net framework and 3rd party libraries in Java with ease. It is designed to provide a way to interact with applications written in anyone of the .Net languages (such as C#, Visual Basic.Net, Delphi.Net, JScript.Net etc) from Java. Competitive Advantages: - dotNet4Java JAR can be easily added to artefacts repository like maven or ivy. - dotNet4Java is single jar file that can be very easily added to any type of Java project EJB, applet, desktop, console or service. - No extra dll is required when deployed. - Full access to .Net Framework Class Library. - Lightweight and easy to use. - There are tools to import and generate .Net Libraries into Java class files. dotNet4Java can do so much: - Access .Net Framework Class Library. - Access Third Party .Net Libraries. - Access Your .Net Libraries. - Can invoke members of a .Net types. - etc Latest Version: 1.0.1.0
    Downloads: 0 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • Next