RSpec Alternatives

JUnit is a simple framework to write repeatable tests.

Cucumber is a BDD tool for specification of application features and user scenarios in plain text.

Application and Data, Build, Test, Deploy, and Testing Frameworks

Capybara helps you test web applications by simulating how a real user would interact with your app.

Arquillian is an open-source testing platform that offers no more container lifecycle, deployment hassles, and mocks.

Mocking framework for unit tests in Java.

Robot Framework is a generic test automation framework for acceptance testing and acceptance...

Testcontainers is a modern Java library that comes with the exclusive support of Junit tests.

TestNG is a testing framework.

Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.

Serverspec.github.com :

Testing Frameworks

NUnit is a unit-testing framework for all .Net languages.