stretchr
A toolkit with common assertions and mocks that plays nicely with the standard library
mockito
Most popular Mocking framework for unit tests written in Java
mountebank-testing
Over the wire test doubles
microcks
The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation sandbox project 🚀
FakeItEasy
The easy mocking library for .NET
richardszalay
Testing layer for Microsoft's HttpClient library. Create canned responses using a fluent API.
Brightify
Boilerplate-free mocking framework for Swift!
wiremock
WireMock.Net is a flexible product for stubbing and mocking web HTTP responses using advanced request matching and response templating. Based on WireMock Java, but extended with more functionality. Full documentation can be found at https://wiremock.org/dotnet/.
testdouble
A minimal test double library for TDD with JavaScript
tonerdo
Replace any .NET method (including static and non-virtual) with a delegate
NagRock
Mocking library for TypeScript
nomemory
MockNeat - the modern faker lib.
devlucky
:bird: Next generation mocking framework in Javascript