MiniProfiler.AspNetCore.Mvc by: Nick Craver

Lightweight mini-profiler, designed for ASP.NET Core MVC (*not* System.Web) websites

MiniProfiler.EntityFrameworkCore by: Nick Craver

MiniProfiler: Integration for Entity Framework Core

MiniProfiler.Shared by: Marc Gravell, Jarrod Dixon, Yaakov Ellis, Nick Craver

You shouldn't reference this - MiniProfiler's shared library for all frameworks

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.Bson by: MongoDB Inc.

MongoDB's Official Bson Library.

MongoDB.Bson.signed by: MongoDB Inc., Kephas Framework

(Unofficial) Signed MongoDB's Bson Library. The containing assembly was generated by signing the officially published MongoDB.Bson.dll.

MongoDB.Driver by: MongoDB Inc.

Official .NET driver for MongoDB.

MongoDB.Driver.Core by: MongoDB Inc.

Core Component of the Official MongoDB .NET Driver.

MongoDB.Driver.GridFS by: MongoDB Inc.

GridFS Component of the Official MongoDB .NET Driver.

MongoDB.Libmongocrypt by: MongoDB Inc.

Libmongocrypt wrapper for the .NET driver.

Mono.Cecil by: Jb Evain

Cecil is a library written by Jb Evain to generate and inspect programs and libraries in the ECMA CIL format. It has full support for generics, and support some debugging symbol format. In simple English, with Cecil, you can load existing managed assemblies, browse all the contained types, modify them on the fly and save back to the disk the modified assembly.

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

MonoMod.Backports.Shims by: 0x0ade, DaNike

Shims for MonoMod.Backports to redirect certain OOB packages

MonoMod.RuntimeDetour by: 0x0ade

Flexible and easily extensible runtime detouring library. Wrap, replace and manipulate (Mono.Cecil) methods at runtime.

MonoMod.Utils by: 0x0ade

Utilities and smaller MonoMod "components" (f.e. ModInterop, DynDll, DynData). Can be used for your own mods. Required by all other MonoMod components.

MoonSharp by: Marco.Mastropaolo

A Lua interpreter written entirely in C# for the .NET, Mono, Xamarin and Unity3D platforms.

Moq by: Daniel Cazzulino, kzu

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