To coincide with this weeks release of our latest refcard, Selenium 2.0: Getting Started With the WebDriver API, I've compiled a list of some of the best refcardz in the collection related to testing

Selenium 2.0: Using the WebDriver API to Create Robust User Acceptance Tests

Matt Stine introduces Selenium 2.0, explaining how the WebDriver API is now used for browser control in the latest release of Selenium. Installation (through Java, Ruby, Python and C#) and browser coverage is outlined, before discussing the page interaction model that WebDriver provides. Selenium support for mobile devices and the remote WebDriver are also included in this card. 

For those looking for a Selenium 1.0 reference, you can download the earlier Getting Started with Selenium.

PHPUnit: PHP Test-Driven Development - Automated Tools to Improve Your PHP Code Quality

PHP developers looking to use test their applications will find the PHPUnit refcard really useful. It goes through installation and writing your tests, introducing concepts such as assertions, fixtures and annotations. 

JUnit and EasyMock

JUnit has long been the most popular testing framework available for Java developers. This refcard gives a great introduction to the unit testing approach, explaining what a test case is and outlining the JUnit lifecycle. The card focussed on JUnit 4, and as such lists out the annotations that have been introduced. 

The second half of the card discusses the EasyMock framework, which facilitates the creation of mock objects using the java.lang.reflect.Proxy object. 

This is probably the best reference to get going with testing your Java application logic.

Getting Started with Fitnesse

Fitnesse is an open source framework that executes Wiki pages which call custom written fixtures. As the tests are written through Wiki, customers, testers and programmers can all write tests. The fixtures can be written in Java, C# or Ruby.

The card goes through installation, how to write a test and create suites, how to write fixtures and how to run your tests. 

Getting Started with Firebug 1.5

While not quite fitting in with the other cards on this list, Firebug is a really useful tool for debugging CSS, HTML, JavaScript and DOM on your website. The card explains how to install Firebug and to use it for profile and debug Javascript. Developers will find this most useful as it has a comprehensive listing of all keyboard and mouse shortcuts used.