Cucumber - Cucumber is a BDD tool for specification of application features and user scenarios in plain text.
PHPCodeChecker - PHPCodeChecker is a best-in-class service that enables developers and PHP programmers to write their code online and analyze it.
Capybara - Capybara helps you test web applications by simulating how a real user would interact with your app.
WritePHPOnline.Com - WritePHPOnline.Com is an online site that enables you to write code in PHP and view its output.
RSpec - RSpec is a testing tool for the Ruby programming language born under the banner of Behavior-Driven Development featuring a rich command line program, textual descriptions of examples, and more.
Paiza.io - Paiza.io allows you to write and run code in many languages.