Galen Framework - Automated testing of look and feel for your responsive app
One Click Test - Tool for quickly testing your design layout in one click.
Reapp - An easier, faster way to build apps with React and JavaScript.
W3C Mobile Checker - Make websites work better on mobile devices
RestControl - Modern and powerful framework for testing and validation REST api
ProtoPie - ProtoPie is the easiest tool used to turn your UI/UX design ideas into highly interactive prototypes for mobile, desktop, web, all the way to IoT.