Responsively is described as 'Develop responsive web apps 5x faster! A must-have DevTool for all Front-End developers that will make your job easier' and is a Web Debugger in the development category. There are six alternatives to Responsively for Mac, Windows, Linux and Web-based. The best Responsively alternative is MultiGlancer, which is both free and Open Source. Other great apps like Responsively are Polypane, Sizzy, Blisk and Solis.
MultiGlancer is a minimalist and open-source tool I've developed to streamline the web development process. It allows developers to view their site on multiple web sizes simultaneously on a single screen. Born out of necessity while perfecting my landing page for ArcanePad.
Polypane is a browser built from the ground up to create websites and apps. Polypane is the only browser that lets you develop a website for all viewports and devices at once, and gives you the best overview of them.
Blisk is a browser for web developers, QA engineers, and web designers with built-in mobiles, tablets, laptops, and desktops. It provides teams and freelancers with a workspace to develop and test modern web applications twice faster.
Solis is a Live Design Output that integrates seamlessly with your favourite code editor to deliver real time, multi viewport previewing of HTML, CSS, SASS and LESS as you write it.
Responsinator helps website makers quickly get an indication of how their responsive site will look on the most popular devices.
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