Selenium!

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 »

The lack of integration among open-source test automation frameworks amid unaffordable commercial solutions is a major challenge for effectively applying test automation.

SlimerJS is a scriptable browser. It allows you to manipulate a web page with a Javascript script: opening a webpage, clicking on links, modifying the content... It is useful to do functional tests, page automaton, network monitoring, screen capture etc.

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.

TestCafe is a pure node.js end-to-end solution for testing web apps. It takes care of all the stages: starting browsers, running tests, gathering test results and generating reports. TestCafe doesn’t need browser plugins - it works in all popular modern browsers out-of-the-box.

Windows macro and easy Windows automation with Macro Scheduler Automation Software. With this Windows scripting tool, you can use over 300 powerful script commands to automate Windows create Windows scripts, or use the Macro Recorder to record macros. Macro Scheduler allows you to automate almost any task on your computer, and is a time-saving tool that suits business and home users alike. Works with Win9x/NT/ME/2000/XP/Vista.

CloudQA is cloud based test automation platform which will significantly reduce time, cost and complexity of your testing process. CloudQA does not need any test infrastructure. One could get started within minutes to record and execute a test case. CloudQA is easy to use, modular, accessible anytime anywhere with good scale.

Robot Framework is a generic test automation framework for acceptance testing and acceptance test-driven development (ATDD). It has easy-to-use tabular test data syntax and it utilizes the keyword-driven testing approach. Its testing capabilities can be extended by test libraries implemented either with Python or Java, and users can create new higher-level keywords from existing ones using the same syntax that is used for creating test cases.

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. »

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! »

The httest provides a large variety of HTTP-related functionality, useful for implementing all kinds of HTTP-based tests.

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.