The Functional Testing Tools Directory presents a list of commercial or open source functional software testing tools like Selenium, Cucumber or JBehave. The web site also proposes pointers to tools reviews or presentations and contains a page of resources associated to functional software testing. Visit http://www.functionaltestingtools.com/

The Unit Testing and Mocking Tools Directory presents a list of unit testing and mocking tools, both open source and commercial, for the main programming languages (Java, .NET, ruby, etc). It contains also a list of resources associated to this topic. Visit http://www.unittestingtools.com/

This Selenium tutorial is intended for people having an interest in testing web applications. Its objectives are to show you how to write tests that effectively test your applications but also how to integrate Selenium in your existing testing processes following the good practices that this tool requires.

Acceptance Testing is defined as the planned evaluation of a system by customers to assess to what degree it satisfies their expectations. The Acceptance Test Engineering Guide provides guidance for technology stakeholders (developers, development leads, testers, test leads, architects, etc.) and business stakeholders (managers, customers, end users, etc) on the discipline of acceptance testing.

Mutation testing is known for being difficult and expensive, but we’re here to show you a real-world system you can build in just a few hours with a little C# code and Visual Studio.

A 14-part series of articles describing the use of automated unit testing techniques for the C# programmer. The tutorial includes the use of NUnit and Moq but is also relevant for other testing frameworks.

This free book is a step-by-step guide for Cucumber, the open source ruby Behavior Driven Development tool.
http://cuke4ninja.com/

Lynn McKee has compiled an excellent listing of mnemonics used in software testing.

Weekend Testers is a platform for software testers to collaborate, test various kinds of software, foster hope, gain peer recognition, and be of value to the community.

Programmers use Coding Dojos to exercise their programming skills in a group setup. Deliberately they get together to pair program and get feedback from peers. But how do testers train their skills? Testing Dojos provide a similar setup as Coding Dojos, but help testers to practice their individual skills in a group. This web site is a reference for everything about Testing Dojos.
http://www.testingdojo.org/