Top 20 NuGet mock Packages

A fluent expression builder that allows easy verification of ILogger Log* (LogDebug, LogInformation, LogError etc) invocations.
Umbraco 8 CMS content mocking helper
DummyData.Initializer (datamock) is tool for generating data to your api services.
HTTP mock server, useful to stub services and simulate dynamic API responses, leveraging ASP.NET Core features, built-in fake data generation and pure C# scripting
Utilities to streamline unit testing in Dynamics CRM 2013 by faking the IOrganizationService against an In-Memory context which runs blazingly fast.
Utilities to streamline unit testing in Dynamics CRM 2015 by faking the IOrganizationService against an In-Memory context which runs blazingly fast.
Azure.Data.Wrappers Class Library
NUnit.Mocks was originally developed for internal use in NUnit's own tests, although we no longer use it for that purpose. In addition, it has been useful as a teaching tool, allowing users to gain familiarity with mocking techniques before moving on to more serious frameworks. For production use,...
NSubstitute auto mocking integration for Stashbox.
A light abstraction around Dapper and Dapper.Contrib that also maintains the behavior IDbConnection. This library facilitates a loosely coupled design and unit testing.
Package Description
A library to help with unit/accpetance tests of code that relies on an external HTTP service, by allowing you to easily mock one.
King.Azure.Data Class Library
Helper methods to work with Entity Framework 6.* and Moq libraries doing mocks of Entity Framework main methods that access database. To understand how to mock on EF 6, then what this package can do for you, give a look at: http://www.codeproject.com/Tips/1045590/Testing-with-mock-on-Entity-Framew...
Automatically creates services for unit testing with constructor parameters as Moq-objects. Docs and info are available on the project's github site https://github.com/rbengtsson/Automoqer
NMock3 is a Mocking framework that uses lambda syntax to setup expectations and test interactions between classes and interfaces.
Smart mock data library
Smart mock data library SQL Server extensions
RhinoMocks auto mocking integration for Stashbox.
An XrmToolBox plugin that can be used to generate the XRM form model for xrm-mock test framework.