Galen Framework : Automated testing of look and feel for your responsive websites.
Layout testing seemed always a complex task. Galen Framework offers a simple solution...
Foundation : An easy to use, powerful, and flexible framework for building prototypes and production code on any kind of device.
Ink : A Responsive Email Framework from ZURB. Quickly create responsive HTML emails that work on any device & client. Even Outlook.
Spectre.css : Spectre.css is a lightweight, responsive and modern CSS framework for faster and extensible development.
lightweight and clean starting point for your...
Zombie.js : Zombie.js is a lightweight framework for testing client-side JavaScript code in a simulated environment. No browser required.
Breaking CSS is easy. Checking every responsive page element is hard. That’s why there's BackstopJS.