Pannellum is described as 'Lightweight, free, and open source panorama viewer for the web. Built using HTML5, CSS3, JavaScript, and WebGL, it is plug-in free. It can be deployed easily as a single file, just 15kB gzipped, and then embedded into pages as an <iframe>' and is an app in the photos & graphics category. There are eight alternatives to Pannellum for a variety of platforms, including Windows, Linux, Mac, Web-based and Windows Mobile apps. The best Pannellum alternative is SphereView, which is both free and Open Source. Other great apps like Pannellum are lux, FSPViewer, Photo Sphere Viewer and Panorado.