mono — open-source software health

NuGet · npm

98Exceptionalhealth index

Open-source platform for building cross-platform native Mobile, Web, Desktop, and Embedded apps from a single C#/XAML codebase. Work from any IDE/CLI with Hot Reload, Visual Designer, MCPs, and Skills built for modern .NET workflows. 200M+ NuGet downloads.

C#★ 10KAug 28, 2026

Apache-2.0Aug 28, 2026 · metrics 2.10.0

Maven · npm

96Exceptionalhealth index

reactor/reactor-core

Non-Blocking Reactive Foundation for the JVM

Java★ 5,235Aug 28, 2026

Apache-2.0Aug 28, 2026 · metrics 2.10.0

Maven · npm

96Exceptionalhealth index

reactor/reactor-netty

TCP/HTTP/UDP/QUIC client/server with Reactor over Netty

Java★ 2,778Oct 19, 2026

Apache-2.0Oct 19, 2026 · metrics 2.10.0

NuGet

94Exceptionalhealth index

NLog/NLog

NLog - Flexible and Structured Logging for various .NET Platforms

C#★ 6,546Aug 28, 2026

BSD-3-ClauseAug 28, 2026 · metrics 2.10.0

NuGet

93Exceptionalhealth index

icsharpcode/ILSpy

.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!

C#★ 26.1KSep 16, 2026

MITSep 16, 2026 · metrics 2.10.0

NuGet

93Exceptionalhealth index

unoplatform/uno.extensions

Libraries to ease common developer tasks associated with building multi-platform mobile, desktop and web applications using Uno Platform or WinAppSDK.

C#★ 103Sep 10, 2026

Custom licenseSep 10, 2026 · metrics 2.10.0

NuGet

92Excellenthealth index

unoplatform/uno.toolkit.ui

A set of custom controls for the WinUI and the Uno Platform not offered out of the box by WinUI, such as Card, TabBar, NavigationBar, etc.

C#★ 111Sep 13, 2026

MITSep 13, 2026 · metrics 2.10.0

PyPI

90Excellenthealth index

pythonnet/pythonnet

Python for .NET is a package that gives Python programmers nearly seamless integration with the .NET Common Language Runtime (CLR) and provides a powerful application scripting tool for .NET developers.

C# · Python★ 5,512↓ 3.1M/moAug 28, 2026

MITAug 28, 2026 · metrics 2.10.0

Maven

89Excellenthealth index

reactor/reactor-addons

Additional optional modules for the Reactor project

Java★ 244Oct 19, 2026

Apache-2.0Oct 19, 2026 · metrics 2.10.0

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86Excellenthealth index

ably/ably-pubsub-dotnet

.NET, MAUI, Xamarin, Mono and Unity client library SDK for Ably realtime messaging service

C#★ 51Sep 15, 2026

Apache-2.0Sep 15, 2026 · metrics 2.10.0

NuGet

86Excellenthealth index

fsprojects/Paket

A dependency manager for .NET with support for NuGet packages and Git repositories.

F# · C#★ 2,087Oct 5, 2026

MITOct 5, 2026 · metrics 2.10.0

NuGet

84Excellenthealth index

opentk/opentk

The Open Toolkit library is a fast, low-level C# wrapper for OpenGL, OpenAL & OpenCL. It also includes windowing, mouse, keyboard and joystick input and a robust and fast math library, giving you everything you need to write your own renderer or game engine. OpenTK can be used standalone or inside a GUI on Windows, Linux, Mac.

C#★ 3,538Sep 11, 2026

Custom licenseSep 11, 2026 · metrics 2.10.0

NuGet

83Excellenthealth index

pardeike/Harmony

A library for patching, replacing and decorating .NET and Mono methods during runtime

C#★ 6,683Oct 8, 2026

MITOct 8, 2026 · metrics 2.10.0

NuGet

83Excellenthealth index

unoplatform/Uno.Wasm.Bootstrap

A simple nuget package to run C# code in a WASM-compatible browser

WebAssembly · JavaScript★ 382Sep 11, 2026

Custom licenseSep 11, 2026 · metrics 2.10.0

NuGet

81Excellenthealth index

Azure/amqpnetlite

AMQP 1.0 .NET Library

C#★ 420Oct 20, 2026

Apache-2.0Oct 20, 2026 · metrics 2.10.0

NuGet

78Goodhealth index

kleisauke/net-vips

.NET binding for libvips.

C#★ 522Aug 26, 2026

MITAug 26, 2026 · metrics 2.10.0

NuGet

77Goodhealth index

SteveGilham/altcover

Cross-platform coverage gathering and processing tool set for dotnet/.Net Framework and Mono

F#★ 532Sep 16, 2026

MITSep 16, 2026 · metrics 2.10.0

NuGet

75Goodhealth index

MonoMod/MonoMod

C# modding swiss army knife, powered by cecil.

C#★ 995Oct 3, 2026

MITOct 3, 2026 · metrics 2.10.0

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75Goodhealth index

unoplatform/uno.fonts

Uno Platform Fonts

PowerShell★ 12Sep 14, 2026

Custom licenseSep 14, 2026 · metrics 2.10.0

npm · NuGet

73Goodhealth index

agracio/edge-js

Run .NET and Node.js code in-process on Windows, MacOS, and Linux

C++★ 837↓ 22.2K/moSep 23, 2026

MITSep 23, 2026 · metrics 2.10.0

—

69Goodhealth index

dotnet/WatsonTcp

WatsonTcp is the easiest way to build TCP-based clients and servers in C#.

C#★ 673Sep 14, 2026

MITSep 14, 2026 · metrics 2.10.0

npm · NuGet

67Goodhealth index

agracio/electron-edge-js

Run .NET code in Electron on Windows, MacOS, and Linux

C++★ 391↓ 9,179/moOct 3, 2026

MITOct 3, 2026 · metrics 2.10.0

NuGet

63Moderatehealth index

josephmoresena/Rxmxnx.PInvoke.Extensions

Rxmxnx.PInvoke.Extensions is a comprehensive library designed to streamline and enhance the interaction between .NET and native P/Invoke methods.

C#★ 18Aug 25, 2026

MITAug 25, 2026 · metrics 2.10.0

NuGet

60Moderatehealth index

jchristn/SuperSimpleTcp

Simple wrapper for TCP client and server in C# with SSL support

C#★ 533Sep 19, 2026

MITSep 19, 2026 · metrics 2.10.0

NuGet

59Moderatehealth index

lextudio/sharpsnmplib

C# SNMP Library (#SNMP) - Open source SNMP implementation for C# and .NET

C#★ 404Aug 27, 2026

MITAug 27, 2026 · metrics 2.10.0

NuGet

56Moderatehealth index

junian/Standard.Licensing

Easy-to-use licensing library for .NET Framework, Mono, .NET Core, and MAUI / Xamarin products

C#★ 680Oct 7, 2026

MITOct 7, 2026 · metrics 2.10.0

NuGet

54Moderatehealth index

JetBrains/profiler-api

The portable version of JetBrains profiler API for .NET Framework / .NET Core / .NET / .NET Standard / Mono

C#★ 36Sep 14, 2026

Apache-2.0Sep 14, 2026 · metrics 2.10.0

NuGet

54Moderatehealth index

Ruslan-B/FFmpeg.AutoGen

FFmpeg auto generated unsafe bindings for C#/.NET and Core (Linux, MacOS and Mono).

C# · C★ 1,607Sep 18, 2026

MITSep 18, 2026 · metrics 2.10.0

NuGet

47Weakhealth index

jchristn/RestDb

RESTful HTTP/HTTPS server for Microsoft SQL Server, MySQL, and PostgreSQL

C# · JavaScript★ 49Oct 3, 2026

MITOct 3, 2026 · metrics 2.10.0

npm

41Weakhealth index

electrovir/mono-vir

No repository description published.

TypeScript★ 0↓ 28.2K/moOct 21, 2026

CC0-1.0Oct 21, 2026 · metrics 2.10.0

#mono