Top 20 NuGet Unit Testing Packages

A Cucumber/Gherkin-style BDD test support library that doesn't suck, cross my heart.
Fake Object data generation and population, like Ruby's Faker gem, for .NET
A library for recording and replaying HTTP interactions. Inspired by the VCR ruby gem.
CHESS is a open source tool created by Microsoft Research for systematic and disciplined testing of concurrent programs.
Framework for UI Automation Testing. Web, Mobile, Desktop
Framework for UI Automation Testing. Web, Mobile, Desktop
Framework for UI Automation Testing. Web, Mobile, Desktop
Framework for Web UI Automation Testing
HTTP API mocking library
This is the console application for Edison, to be used when running tests. Edison is an open source unit/integration test framework for .NET.
Exprimental fork of https://github.com/epam/JDI. Framework for UI Automation Testing. Web, Mobile, Desktop
The Wonga.ServiceTesting.EndpointLauncher that helps with starting and managing lifecycle of external processes used in tests.
Web-Drivers for using with Selenium. All driver are from the official distributer with no modifications, and tested against the latests Gravity version.
A set of utilities to generate random data for testing, data generation or when you just need to get Random.
Google C++ testing framework.
This is the core framework with compatability for TestDriven.NET for Edison, to be used when writing tests. Edison is an open source unit/integration test framework for .NET.
Ensure the state of parameters or variables.
The P# language, runtime and testing infrastructure
Google C++ testing framework.
Gravity API Standalone Server (SOAP and WebApi) for in-project implementation