Layout testing seemed always a complex task. Galen Framework offers a simple solution: test location of objects relatively to each other on page. Using a special syntax and comprehensive rules you can describe any layout you can imagine
Runs in Selenium Grid
Galen Framework runs well in Selenium Grid. You can set up your tests to run in a cloud like Sauce Labs or BrowserStack so that you can even test your responsive websites on different mobile devices. Galen can run multiple tests in parallel which is also a nice time saver.
See more here : http://galenframework.com/