Some ideas for multi-layered SVG shape overlays that get generated dynamically with adjustable properties for a variety of effects.
Moving Letters is a collection of cool animated letters and typography effects.
ResizeEnd is a jQuery plugin that allows for window resize-end event handling.
Draggable is a modular drag & drop library, allowing you to start small and build up with the features you need. At its most basic, Draggable gives you drag & drop functionality, fast DOM reordering, accessible markup, and a bundle of events to grab on to.