udraggable.js : jQuery plugin to make elements draggable by mouse or touch

This plugin provides an API similar to jQueryUI’s draggable but with support for unified mouse and touch events.  It aims to provide a minimum useful subset rather than attempting to clone the full range of behaviours supported by jQueryUI. However some of the limitations can be worked around quite simply.The udraggable plugin allows you to make elements draggable with a single line of code and to use a declarative syntax to define the constraints of the dragging behaviour.