Selenium - Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.
sitebot.ai - The easiest way to monitor that your website is working as it should. Sitebot uses a real browser to test your site and login automatically.
TestingWhiz - TestingWhiz is a codeless test automation tool for software, mobile and web.
DiffHub - Automated Web UI & Functional Testing for non Engineers
CrossBrowserTesting - Browser Testing made simple! Run automated, visual, and manual tests on 1500+ real browsers and mobile devices. Test more browsers, in less time.
BrowserStack - BrowserStack is a software testing platform for developers to comprehensively test websites and mobile applications for quality.