JSON

jqtimeline is a lightweight, simple and elegent timeline plugin for jQuery to show a set of important events on a timeline. Data input is a simple json arrary of timeline events. This plugin can be easily integrated with any other jQuery plugins. Can be use to create Social apps, showing blog timeline, social posts timeline etc.    

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    

Mosaiqy is a jQuery plugin to organize and show image thumbnails and zoom, easy to integrate also with Flickr, Instagram, Panoramio and other.  Thumbnails are arranged in a grid and each row and column could be randomically moved, sliding in every direction and showing other thumbnails available. Image data is described as a regular JSON object.  And all expensive animations are taken over by your GPU on recent browsers using CSS3 transitions, minimizing the CPU overhead.