Selenium would be most widely used automation testing tool. It is a open source testing framework used in testing applications of different platforms. It allows the testers to write scripts in a domain language called "Selenese". The test suite consists of the following: Selenium WebDriver Selenium Remote Control Selenium IDE Selenium-Grid Following are the platforms and browsers supported by Selenium: Google Chrome Firefox Opera Safari Internet Explorer 7, 8, 9, 10 and 11 HtmlUnit PhantomJS Android iOS