Drag and Drop

FerroMenu is a free jQuery plugin that allows you to create animatable bubble menus in a cool way and drag them through the screen. It is built with pure HTML5 and CSS3. Transitions and animations are CSS3 native, so they result smooth and performing. Everything is responsive. With several options you can customize the behaviuor of FerroMenu. It can be dragged around the screen, or you can set the transition time, delay and easing.   

Pep is a lightweight jQuery plugin which turns any DOM element into a draggable object. It works across mostly all browsers, from old to new, from touch to click. The author built it to serve a need in which jQuery UI's draggable was not fulfilling, since it didn't work on touch devices (without some hackery).  

Dynatree is a JavaScript dynamic tree view plugin for jQuery with support for persistence, keyboard, checkboxes, drag'n'drop, and lazy loading.   Dynatree - Features: Optimized for large dynamic trees (DOM elements are only created when really needed). Programmable through a rich object oriented interface. Support for lazy loading and Ajax. Checkboxes and hierarchical selection. Supports drag and drop. Support for persistence. Keyboard aware. Initializes from HTML code, JSON, or JavaSc

Fancytree is a JavaScript dynamic tree view plugin for jQuery with support for persistence, keyboard, checkboxes, tables, drag'n'drop, and lazy loading.  

Panzoom is a progressive plugin to create panning and zooming functionality for an element. Panzoom supports the same browsers as jQuery 2.0 and can be used with jQuery 1.9.0+ or jQuery 2.0+.   Rather than setting width and height on an image tag, Panzoom uses CSS transforms and matrix functions to take advantage of hardware/GPU acceleration in the browser, which means the element can be anything: an image, a video, an iframe, a canvas, text, WHATEVER. IE<=8 is not supported, but this plug

Nestable is an interactive drag and drop hierarchical list jQuery plugin with mouse and touch compatibility.    

cyclotron is a simple jQuery plugin for dragging 360° panoramas (cylindrical projection) and other seamlessly looping images around.    

JqTree is a tree widget for jQuery.   JqTree - Features: Create a tree from JSON data Drag and drop Works on ie7+, firefox 3.6+, chrome and safari Written in Coffeescript    

Gridly is a jQuery plugin to enable dragging and dropping as well as resizing on a grid.    

FileAPI is a set of javascript tools for working with files. Multiupload, drag and drop and chunked file upload. Images: crop, resize and auto orientation by EXIF.