Handling Multiple Windows

http://not-just-a-tester.blogspot.in/2012/07/webdriver-script002-handling-multiple.html

http://toolsqa.com/selenium-webdriver/handling-multiple-browsers-in-selenium-webdriver/

http://seleniummaster.com/sitecontent/index.php/introduction-to-selenium-automation/selenium-automation-job-skills-menu/24-selenium-automation-job-interview-category/123-how-to-handle-multiple-windows-in-selenium-interviewquestion

http://www.software-testing-tutorials-automation.com/2014/02/example-of-handling-multiple-browser.html

https://www.seleniumeasy.com/selenium-tutorials/how-to-handle-windows-popups-using-selenium-webdriver

https://www.seleniumeasy.com/selenium-tutorials/perform-operations-on-new-window-using-webdriver