browserling - Live interactive cross-browser testing from your browser.
Ghost Inspector - Easily create automated browser tests for your websites and web apps. Ensure everything works and looks the way it should. No coding required. 14 day free trial!
BrowserStack - BrowserStack is a software testing platform for developers to comprehensively test websites and mobile applications for quality.
Browsershots - Browsershots makes screenshots of your web design in different browsers.
Headspin - Test your mobile app on different global cell networks
LambdaTest - Perform Web Testing on 2000+ Browsers & OS