OpenUI5 lets you build enterprise-ready web applications
HTML, CSS and JS framework for developing responsive websites and apps
A modified web browser that helps in responsive web development
A markup-driven CSS language with enhanced syntax
The BBC's Open Source Single Page Application
A minimalistic, lean and fast HTTP REST API test application
Long-Press Tooltip für Formularelemente und Buttons (jQuery UI)
For Web Developers, Testers, Learners, End Users - Screenshots Below