jQuery Iframe Post Form

This jQuery ajax upload plugin creates a hidden iframe and sets the form’s target attribute to post to that iframe. When the form is submitted, it is posted (including the file uploads) to the hidden iframe. Finally, the plugin collects the server’s response from the iframe.

jQuery EasyTree

Free jQuery plugin for creating tree menus, designed to be easy to use but offer powerful options. Features include persistance, drag ‘n’ drop, lazy loading and themes

jQuery safe xdr

jQuery plugin to make Cross Domain Requests with JavaScript without jsonp. To receive some response for this calls, you have to add the Access-Control-Allow-Origin HTTP header.