Theatre.js is a javascript animation library with a professional motion design toolset. Create animation, from cinematic scenes in THREE.js, to delightful UI interactions.

GrapesJS is an open-source, multi-purpose, Web Builder Framework which combines different tools and features to build HTML.

Node based audio visual programming

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.

Discussion of the GrapeJS Free and Open Source Web Builder Framework