A free browser plugin that helps developers, content editors, & SEO professionals quickly scan webpage for broken links, valid links & potential issues.

Professional software tool for HTTP testing and debugging

Automated robustness testing at the UI level

Test, scrape, generate, and automate without the pain and expense of hosting your own headless browsers.

Robot Framework is a generic open source automation framework. It can be used for test automation and robotic process automation (RPA).

SelectorsHub is the Next Gen XPath Plugin & Selectors tool. It supports all kinds of XPath, locators, shadow dom, iframe, svg, dynamic elements, multi selectors generation and xpath error handling. It is a Free community product.