The 1kb client side MV* library
A fast and fully-featured autocomplete library
DOMPurify - a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMPurify works with a secure default, but offers a lot of configurability and hooks. Demo:
a 2D rigid body physics engine for the web
Multiple file upload plugin with progress-bar, drag-and-drop.
Keep multiple browsers & devices in sync when building websites. http://browsersync.io
motion graphics library for the web
Custom Elements-Based HTML5 UI Framework for Building Your Mobile Front End
Next-gen, highly customizable content editor for the browser - based on React and Redux. WYSIWYG on steroids.