MimeKit by: Jeffrey Stedfast

MimeKit is an Open Source library for creating and parsing MIME, S/MIME and PGP messages on desktop and mobile platforms. It also supports parsing of Unix mbox files. Unlike any other .NET MIME parser, MimeKit's parser does not need to parse string input nor does it use a TextReader. Instead, it parses raw byte streams, thus allowing it to better support undeclared 8bit text in headers as well as message bodies. It also means that MimeKit's parser is significantly faster than other .NET MIME parsers. MimeKit's parser also uses a real tokenizer when parsing the headers rather than regex or string.Split() like most other .NET MIME parsers. This means that MimeKit is much more RFC-compliant than any other .NET MIME parser out there, including the commercial implementations. In addition to having a far superior parser implementation, MimeKit's object tree is not a derivative of System.Net.Mail objects and thus does not suffer from System.Net.Mail's limitations. API documentation can be found on the web at http://www.mimekit.net/docs For those that need SMTP, POP3 or IMAP support, check out https://github.com/jstedfast/MailKit

Mnemosyne by: Jon Hanna

Offers efficient copying, setting and zeroing operations.

modernhttpclient by: Paul Betts

Write your app using System.Net.Http, but drop this library in and it will go drastically faster.

MongoDB.Driver.Core by: MongoDB Inc.

Core Component of the Official MongoDB .NET Driver.

MongoDB.Libmongocrypt by: MongoDB Inc.

Libmongocrypt wrapper for the .NET driver.

Mono.Options by: Microsoft

A Getopt::Long-inspired option parsing library for C#.

Mono.TextTemplating by: Mikayla Hutchinson

Open-source implementation of the T4 templating engine.

Mono.Unix by: Microsoft

Provides functionality for managed code to access Posix/Unix features not accessible via BCL

Moq by: Kzu

Moq (pronounced "Mock-you" or just "Mock") is the only mocking library for .NET developed from scratch to take full advantage of .NET 3.5 (i.e. Linq expression trees) and C# 3.0 features (i.e. lambda expressions) that make it the most productive, type-safe and refactoring-friendly mocking library available

MSBuild.Sdk.Extras by: Claire Novotny

An MSBuild SDK package for SDK-style .NET projects that has additional properties and targets which extends `Microsoft.NET.Sdk`.

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 and Unity3D.

MSTest.Analyzers by: Microsoft

MSTest is Microsoft supported Test Framework. This package includes code analyzers and code fixes for MSTest.

MSTest.TestAdapter by: Microsoft

MSTest is Microsoft supported Test Framework. This package includes the adapter logic to discover and run tests. For access to the testing framework, install the MSTest.TestFramework package. Supported platforms: - .NET 4.6.2+ - .NET Core 3.1+ - .NET 6.0+ - .NET 6.0 Windows.18362+ - UWP 10.0.16299 - UWP 10.0.17763 with .NET 9

MudBlazor by: Garderoben, Henon and Contributors

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

MvvmLight by: Laurent Bugnion (GalaSoft)

The MVVM Light Toolkit is a set of components helping people to get started in the Model-View-ViewModel pattern in Silverlight, WPF, Windows Phone, Windows 10 UWP, Xamarin.Android, Xamarin.iOS, Xamarin.Forms. It is a light and pragmatic framework that allows you to pick which components you want to use. This version will add the MVVM Light libraries as well as some scaffolding to your application to convert it in an MVVM app!

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.

ncrontab by: Atif Aziz

NCrontab is crontab for Microsoft .NET Framework 2.0 and above. 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.

NEST by: Elasticsearch Inc. and contributors

Elasticsearch client, strongly typed interface to Elasticsearch. Fluent request builder, mapped responses and powerful query dsl. Uses and exposes Elasticsearch.Net