Easier than "sacarse los mockos".

Create API mocks collaboratively, fully online and with custom code logic.

• Mockos @ GitHub.

A Powerful API Mocking and Testing Tool

A full suite of tools to create and share API contracts, test APIs, mock them, and integrate them with web and mobile apps with ease.

• Requestly @ GitHub.

Highly opinionated mocking framework for PHP 5.3+.

Prophecy is a highly opinionated yet very powerful and flexible PHP object mocking framework. Though initially it was created to fulfil phpspec2 needs, it is flexible enough to be used inside any testing framework out there with minimal effort.

Moq (pronounced "Mock-you" or just "Mock") is the only mocking library for .NET developed from scratch to take full advantage of .NET Linq expression trees and lambda expressions, which makes it the most productive, type-safe and refactoring-friendly mocking library available.

Moq @ GitHub