Mono.Posix.NETStandard by: Microsoft

Provides functionality to access Posix/Unix features

Mono.TextTemplating by: Mikayla Hutchinson

Embeddable engine for the T4 templating language, a general-purpose way to generate text or code files using C#

Moq by: Daniel Cazzulino kzu

Moq is the most popular and friendly mocking framework for .NET.

Moq.EntityFrameworkCore by: Michał Jankowski

Library that provides methods that will help you with mocking Entity Framework Core.

MSBuild.Sdk.Extras by: Oren Novotny

Additional MSBuild targets and properties for SDK-style .NET projects.

MsgPack.Cli by: FUJIWARA Yusuke

MessagePack is fast, compact, and interoperable binary serialization format. This package provides MessagePack serialization/deserialization APIs. This pacakge also supports Mono, Xamarin, .NET Core and Unity.

MudBlazor by: Garderoben Henon and Contributors

Blazor Component Library based on Material Design principles with an emphasis on ease of use and extensibility

MyCSharp.HttpUserAgentParser by: MyCSharp.de Benjamin Abt Günther Foidl and Contributors

Parses user agents for Browser, Platform and Bots.

MySql.Data by: Oracle Corporation

MySql.Data.MySqlClient .Net Core Class Library

MySqlConnector by: Bradley Grainger

A truly async MySQL ADO.NET provider, supporting MySQL Server, MariaDB, Amazon Aurora, Azure Database for MySQL, Google Cloud SQL, and more.

Namotion.Reflection by: Namotion.Reflection

.NET library with advanced reflection APIs like XML documentation reading, Null Reference Types (C# 8) reflection and string based type checks.

ncalc by: Sebastien Ros

NCalc is a mathematical expressions evaluator in .NET. NCalc can parse any expression and evaluate the result, including static or dynamic parameters and custom functions.

NConsole by: Rico Suter

NConsole is a .NET library to parse command line arguments and execute commands.

NCrontab by: Atif Aziz

NCrontab is crontab for all .NET runtimes supported by .NET Standard 1.0. It provides parsing and formatting of crontab expressions as well as calculation of occurrences of time based on a schedule expressed in the crontab format.

Nerdbank.GitVersioning by: Andrew Arnott

Stamps your assemblies with semver 2.0 compliant git commit specific version information and provides NuGet versioning information as well.

Nerdbank.Streams by: Andrew Arnott

Streams for full duplex in-proc communication, wrap a WebSocket, split a stream into multiple channels, etc.

NetBox by: Ivan Gavryliuk (@aloneguid)

Provides common simple helper functions to accelerate .NET development. Those vary by complexity and nature and include a lot of extension methods to calculate hashes (md5, crypto), string operations, short guids, string encoding, collection extensions, CSV support and many more.

NETCore.Encrypt by: Lvcc

NETCore encrypt and decrpty tool，Include AES，RSA，MD5，SAH1，SAH256，SHA384，SHA512

NetLegacySupport.Action by: Microsoft

System.Action and System.Func for .NET Framework 2.0, 3.5. This is a backport from .NET Core.

NetLegacySupport.ConcurrentDictionary by: Microsoft

System.ConcurrentDictionary for .NET Framework 2.0, 3.5. This is a backport from .NET Core.