* [Mockoon: awesome API mocking v9.9.0](https://github.com/mockoon/mockoon) – Tool to design and run mock APIs locally without remote deployment or accounts.

* [Nock v15.0.1](https://github.com/nock/nock) – HTTP server mocking and expectations library for Node.js.

* [ng-mocks v14.18.0](https://github.com/help-me-mom/ng-mocks) – Library to mock Angular components, directives, pipes, services, and tokens for simplified testing.

* [mockery v3.8.1](https://github.com/vektra/mockery) – Tool for generating mocks for Go interfaces, reducing boilerplate code.

* [Mock Service Worker v3.0.3](https://github.com/mswjs/msw) – Network-level API mocking library using Service Worker for seamless request interception in JavaScript.

* [jest-mock-extended 4.0.2](https://github.com/marchaos/jest-mock-extended) – Type-safe TypeScript mocking extensions for Jest, providing typed mocks, calledWith, deep mocks, and mock utilities.

* [UnitAuto 3.2.1](https://github.com/TommyLemon/UnitAuto) – Machine learning–powered, coding-free unit testing that automatically generates comprehensive tests for methods and functions using runtime mocks.

* [Mockey v1.4.7](https://github.com/bytedance/mockey) – Golang library for mocking functions, methods, and variables with runtime instruction rewriting.

* [Mokapi v0.52.0](https://github.com/marle3003/mokapi) – API mocking tool using OpenAPI and AsyncAPI to simulate HTTP, Kafka, LDAP, and SMTP with JavaScript-driven behaviors.