Drag and Drop

FullCalendar is a jQuery plugin that provides a full-sized, drag & drop calendar. It uses AJAX to fetch events on-the-fly for each month and is easily configured to use your own feed format (an extension is provided for Google Calendar). It is visually customizable and exposes hooks for user-triggered events (like clicking or dragging an event).     

Overscroll is a jQuery plug-in that mimics the iphone/ipad scrolling experience in a browser. The plug-in adds a draggable drift to overflowed DOM elements as well as a set of fading 'thumbs'. OverScroll runs best on Safari 5+, Chrome 5+, and Firefox 3+ but should run just fine on most modern browsers.     

HTML5 Sortable is a jQuery plugin to create sortable lists and grids using native HTML5 drag and drop API.   This sortable plugin has the following features: Less than 1KB (minified and gzipped). Built using native HTML5 drag and drop API. Supports both list and grid style layouts. Similar API and behaviour to jquery-ui sortable plugin. Works in IE 5.5+, Firefox 3.5+, Chrome 3+, Safari 3+, and Opera 12+.