Site Valet : Web Tools for Quality, Accessibility, Standards Compliance.
Screenfly : Test Your Website at Different Screen Resolutions
W3C mobileOK Checker : This checker performs various tests on a Web Page to determine its level of mobile-friendliness.
webhint : webhint is a linting tool that will help you with your site's accessibility, speed, security and more, by checking your code for best practices and co...
Appium : Appium is an open source test automation framework for use with native, hybrid and mobile web apps.
It drives iOS and Android apps using the WebDriver...
The mobiReady testing tool evaluates mobile-readiness using industry best practices & standards.