CrossBrowserTesting - Browser Testing made simple! Run automated, visual, and manual tests on 1500+ real browsers and mobile devices. Test more browsers, in less time.
RainforestQA - Insanely simple testing. Create tests for your website in plain English, then run them across all major browsers with a single click. Powered by human intelligence
BrowserStack - BrowserStack is a software testing platform for developers to comprehensively test websites and mobile applications for quality.
LambdaTest - Perform Web Testing on 2000+ Browsers & OS
browserling - Live interactive cross-browser testing from your browser.
Appium - Appium is an open source test automation framework for use with native and hybrid mobile apps.