Unit testing asserts can be difficult to use. Approval tests simplify this by taking a snapshot of the results, and confirming that they have not changed.

Arbiter is a requirements gathering and acceptance testing tool for project managers and web developers, to help ease client interaction. The project specification can be defined in word processor format as you would normally. By adding some special items, such as titled bulleted lists and highlighted text items, both a test suite and glossary can be written right into the spec. The Arbiter server will parse these documents and run the tests, reporting the results into the documents themselves. This allows the client to see project process.

It also allows the developers, sitting next to the client, to add concrete executable examples of the use cases. This adds clarity and helps to settle disputes over required functionality. Using the glossary, developers can signal to the client that concepts are not well understood. Tests can be marked pending if a document contains unexplained glossary items.

Arepa is a lightweight non-invasive tool that helps you to implement Behavior Driven Development (BDD) on .NET projects. Arepa produces guidelines of using BDD on your current tests, and customisable and portable test reports integrating XML Documentation Comments. It's developed in C# using Scrum and BDD.

Argus Eyes is a lightweight CLI tool for visual regression testing. Argus eyes does 3 things for you:
* Take screenshots of UI components in different views and branches
* Test the screenshots for visual differences
* Create images of the visual differences

Screenshots are caputured with PhantomJS, comparing sceenshots is done using ImageMagick.

Arquillian enables you to test your business logic in a remote or embedded container. Alternatively, it can deploy an archive to the container so the test can interact as a remote client. The mission of the Arquillian project is to provide a simple test harness that abstracts away all container lifecycle and deployment from the test logic so developers can easily produce a broad range of integration tests for their enterprise Java applications.

A simple yet powerful BDD library for PHP 5

Automated Test Designer, (ATD) is an easy to use windows client / server tool designed to create Test Cases, Test Data and Automated Test Scripts based on Requirements that uses a central repository. Since these Test Cases are based on actual, documented requirements, the test team can be sure that they are testing 100% of the application’s functionality.

A minimalistic easy to setup .Net BDD story runner

AutoIt v3 is a freeware BASIC-like scripting language designed for automating the Windows GUI and general scripting. It uses a combination of simulated keystrokes, mouse movement and window/control manipulation in order to automate tasks in a way not possible or reliable with other languages (e.g. VBScript and SendKeys).

Automation Planner is a suite of tools that create a Keyword Driven Testing Framework, which makes the creation of automated test cases easy. It allows every tester to plan, design and execute test automation scripts and guarantees the test automation success. Automation Planner is integrated with all leading tools such as QTP, TestPartner, Test Complete and more which carry out the actual automated script execution.