Magick.NET.Core by: Dirk Lemstra

ImageMagick is a powerful image manipulation library that supports over 100 major file formats (not including sub-formats). With Magick.NET you can use ImageMagick without having to install ImageMagick on your server or desktop. Visit https://github.com/dlemstra/Magick.NET/tree/main/docs before installing to help you decide the best version.

Magicodes.EPPlus by: Magicodes

Create advanced Excel spreadsheets using .NET

Magnum by: Chris Patterson Dru Sellers

Magnum is a library for the larger than average developer

MahApps.Metro by: Jan Karger Bastian Schmidt Dennis Daume Brendan Forster Alex Mitchell Paul Jenkins Jake Ginnivan

The goal of MahApps.Metro is to allow devs to quickly and easily cobble together a 'Modern' UI for their WPF apps (.Net 4.6.2 and later), with minimal effort.

MailKit by: Jeffrey Stedfast

MailKit is an Open Source cross-platform .NET mail-client library that is based on MimeKit and optimized for mobile devices. Features include: * HTTP, Socks4, Socks4a and Socks5 proxy support. * SASL Authentication via CRAM-MD5, DIGEST-MD5, LOGIN, NTLM, OAUTHBEARER, PLAIN, SCRAM-SHA-1, SCRAM-SHA-256, SCRAM-SHA-512 and XOAUTH2. * A fully-cancellable SmtpClient with support for STARTTLS, 8BITMIME, BINARYMIME, ENHANCEDSTATUSCODES, SIZE, DSN, PIPELINING and SMTPUTF8. * A fully-cancellable Pop3Client with support for STLS, UIDL, APOP, PIPELINING, UTF8, and LANG. * A fully-cancellable ImapClient with support for ACL, QUOTA, LITERAL+, IDLE, NAMESPACE, ID, CHILDREN, LOGINDISABLED, STARTTLS, MULTIAPPEND, UNSELECT, UIDPLUS, CONDSTORE, ESEARCH, SASL-IR, COMPRESS, WITHIN, ENABLE, QRESYNC, SORT, THREAD, ANNOTATE, LIST-EXTENDED, ESORT, METADATA / METADATA-SERVER, NOTIFY, FILTERS, LIST-STATUS, SORT=DISPLAY, SPECIAL-USE / CREATE-SPECIAL-USE, SEARCH=FUZZY, MOVE, UTF8=ACCEPT / UTF8=ONLY, LITERAL-, APPENDLIMIT, STATUS=SIZE, OBJECTID, REPLACE, SAVEDATE, XLIST, and X-GM-EXT1. * Client-side sorting and threading of messages (the Ordinal Subject and the Jamie Zawinski threading algorithms are supported). * Asynchronous versions of all methods that hit the network. * S/MIME, OpenPGP, DKIM and ARC support via MimeKit. * Microsoft TNEF support via MimeKit.

ManagedEsent by: Microsoft

ManagedEsent provides managed access to ESENT, the embeddable database engine native to Windows. ManagedEsent uses the esent.dll that is part of Microsoft Windows so there are no extra unmanaged binaries to download and install.

Mapster by: chaowlert eric_swann

A fast, fun and stimulating object to object mapper. Kind of like AutoMapper, just simpler and way, way faster.

Mapster.Core by: Chaowlert Chaisrichalermpol

Lightweight library for Mapster and Mapster CodeGen

Mapster.DependencyInjection by: Chaowlert Chaisrichalermpol

Dependency Injection supports for Mapster

Markdig by: Alexandre Mutel

A fast, powerful, CommonMark compliant, extensible Markdown processor for .NET with 20+ builtin extensions (pipetables, footnotes, definition lists... etc.)

MassTransit by: Chris Patterson Dru Sellers Travis Smith

MassTransit is a distributed application framework for .NET, including support for MSMQ and RabbitMQ.

MassTransit.RabbitMQ by: Chris Patterson Dru Sellers Travis Smith

This integration library adds support for RabbitMQ to MassTransit, a distributed application framework for .NET, including support for MSMQ and RabbitMQ.

MaterialDesignColors by: James Willock

ResourceDictionary instances containing standard Google Material Design swatches, for inclusion in a XAML application.

MaterialDesignThemes by: James Willock

ResourceDictionary instances containing Material Design templates and styles for WPF controls in .NET.

MathNet.Numerics by: Christoph Ruegg Marcus Cuda Jurgen Van Gael

Math.NET Numerics is the numerical foundation of the Math.NET project, aiming to provide methods and algorithms for numerical computations in science, engineering and every day use. Supports .Net Framework 4.0 or higher and .Net Standard 1.3 or higher, on Windows, Linux and Mac.

MathNet.Numerics.FSharp by: Christoph Ruegg Marcus Cuda Jurgen Van Gael

F# Modules for Math.NET Numerics, the numerical foundation of the Math.NET project, aiming to provide methods and algorithms for numerical computations in science, engineering and every day use. Supports .Net Framework 4.5 or higher and .Net Standard 1.6 or higher, on Windows, Linux and Mac.

MathNet.Numerics.Signed by: Christoph Ruegg Marcus Cuda Jurgen Van Gael

Math.NET Numerics is the numerical foundation of the Math.NET project, aiming to provide methods and algorithms for numerical computations in science, engineering and every day use. Supports .Net Framework 4.0 or higher and .Net Standard 1.3 or higher, on Windows, Linux and Mac. This package contains strong-named assemblies for legacy use cases (not recommended).

MathNet.Symbolics by: Christoph Ruegg

Math.NET Symbolics is a basic open source computer algebra library for .Net and Mono. Written in F# but works well in C# as well. Supports .Net Framework 4.5 or higher and .Net Standard 2.0 or higher, on Windows, Linux and Mac.

MedallionTopologicalSort by: Michael Adelson

A fast implementation of topological sorting that supports stable sorting as well as breaking ties via ThenBy[Descending]

MediatR by: Jimmy Bogard

Simple, unambitious mediator implementation in .NET