Selenium WebDriver is totally freeware software testing tool and we can use it for software web application regression purpose. Hovering mouse on main menu or any other element of web page or simulating mouse movement in webdriver is not very tough task. As you know, We can perform most of actions and operations directly in webdriver software testing tool and you can VIEW FEW OF THEM ON THIS PAGE. But there are also some actions which we can not perform directly in webdriver and to perform them, we need to use some tricky ways. Generating mouse hover event is one of them.