ActivIT Automatron!

Selenium is a suite of tools specifically for testing web applications. Selenium IDE is a Firefox add-on that records clicks, typing, and other actions to make a test, which you can play back in the browser. Selenium Remote Control (RC) runs your tests in multiple browsers and platforms. Tweak your tests in your preferred language.

Kantu allows you to visually automate your task, and makes web automation fun again. It lets you create solutions for web automation, web scraping or web testing in minutes. It's like the ultimate robot stand-in for all of your web browser automation needs! Whatever you used to do manually, Kantu can do automatically -- stuff like filling out forms, clicking on links, performing inquiries, you name it, Kantu has it. Multiple page forms? Not a problem for Kantu.

PhantomJS is a headless WebKit with JavaScript API. It has fast and native support for various web standards: DOM handling, CSS selector, JSON, Canvas, and SVG.

CasperJS is an open source navigation scripting & testing utility written in Javascript for the PhantomJS WebKit headless browser and SlimerJS (Gecko). It eases the process of defining a full navigation scenario and provides useful high-level functions, methods & syntactic sugar for doing common tasks such as:* defining & ordering browsing navigation steps* filling & submitting forms* clicking & following links* capturing screenshots of a page (or part of it)* testing remote DOM* logging events* downloading resources, including binary ones* writing functional test suites, saving results as JUnit XML* scraping Web contents »

iMacros was designed to automate the most repetitious tasks on the web. If there’s an activity you have to do repeatedly, just record it in iMacros. The next time you need to do it, the entire macro will run at the click of a button! With iMacros, you can quickly and easily fill out web forms, remember passwords, create a webmail notifier, download information from other sites, scrape the Web (get data from multiple sites), and more. You can keep the macros on your computer for your own use, or share them with others by embedding them on your homepage, blog, company Intranet or any social bookmarking service. The uses are limited only by your imagination! »

Watir, pronounced water (acronym standing for "Web Application Testing in Ruby"), is an open-source (BSD) family of Ruby libraries for automating web browsers. It allows you to write tests that are easy to read and maintain. It is simple and flexible.

WatiN - Web Application Testing In .Net

Testing the user interface of today’s applications is a very complex and error-prone task. Automating this task is challenging, but approached correctly very rewarding.

TestingWhiz™ is a Code-less Test Automation Tool for automating testing of Web, Mobile, Database, API, Cloud, and Desktop Apps. It can perform End-to-end testing like Functional, Regression, Database, Big Data, Web UI, Cross Browser testing & Distributed Execution for Web, Mobile and Cloud Apps.It is based on a proprietary FAST (Flexible Automation Scripting Technology) Automation Engine with 290+ inbuilt Test Commands that eliminates the need for long hours of scripting, enabling users to get up and ready with test automation in the shortest time-frame. »

DalekJS is an open source UI testing tool.

EveryStep is a free automation tool that records "every step" of a web transaction and replays the script using a real browser. Schedule scripts to run on your machine at set intervals and receive alerts when errors occur.

TestComplete is an automated testing tool, with unmatched support for unit, functional, regression, distributed and HTTP performance testing at the project level. Designed for advanced and novice testers alike, TestComplete will help you achieve thorough Quality Assurance in development from the first line of code right through delivery and maintenance, with no surprises along the way. Ship superior applications, and ship them on time.