Keep multiple browsers & devices in sync when building websites. http://browsersync.io
The 1kb client side MV* library
Node.js Desktop Automation.
The jQuery plugin for magical scroll interactions.
A fast and fully-featured autocomplete library
Multiple file upload plugin with progress-bar, drag-and-drop.
Date/time picker widget based on twitter bootstrap
a 2D rigid body physics engine for the web
React notification made easy 🚀 !
Drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE8+)