我挑选了一些最常用到的ajax,没有去罗列所有的。希望能给大家一点帮助

1 jsolait (JavaScript O Lait)

The goal is to ease JavaScript development by building a free library of reusable

modules and components and enhancing JavaScript with simpler Class and Module handling

mechanisms.

features

 Class and Module helpers

 String formatting

  "Hello %d. user".format(10)  --> "Hello 10. user"

 Modules

2 PHP-O-Lait

 jsolait JSON-PHP PHP-JSON(php ext)

PHP-O-Lait, in two boiler-plate lines of code (three if you include the

'require_once') provides a transparent bridge between server-side PHP methods and

client-side JavaScript code.

3 Prototype JavaScript library​

4 script.aculo.us web 2.0 javascript​

 Visual effects

 Drag-and-drop

 Controls

5 overLIB​

overLIB is a JavaScript library created to enhance websites with small popup

information boxes (like tooltips) to help visitors around your website.

6 xajax

xajax is an open source PHP class library that allows you to easily create powerful, web-based, Ajax applications using HTML, CSS, JavaScript, and PHP. Applications developed with xajax can asynchronously call server-side PHP functions and update content without reloading the page.

7 Yahoo! User Interface Library

The Yahoo! User Interface (YUI) Library is a set of utilities and controls, written in

JavaScript, for building richly interactive web applications using techniques such as

DOM scripting, DHTML and AJAX. The YUI Library also includes several core CSS

resources.

 YUI Library Utilities

 YUI Library Controls

 YUI Library CSS Tools

YAHOO.util.Connect.setForm(formId); 

var cObj = YAHOO.util.Connect.asyncRequest('POST', 'http://www.yahoo.com', callback);