Pure JS Application libraries / Frameworks:
Command reference: http://www.bosrup.com/web/overlib/?Command_Reference
Simple AJAX Code-Kit
Sarissa is an ECMAScript library acting as a cross-browser wrapper for native XML APIs. It offers various XML related goodies like Document instantiation, XML loading from URLs or strings, XSLT transformations, XPath queries etc and comes especially handy for people doing what is lately known as “AJAX” development.
CPAINT (Cross-Platform Asynchronous INterface Toolkit) is a multi-language toolkit that helps web developers design and implement AJAX web applications with ease and flexibility.
DOM-Drag is a lightweight, easy to use, dragging API for modern DHTML browsers.
Enterprise Class AJAX
Rubust AJAX framework
Interactive Website Framework
XMLHTTP is a technology with which a developer can access external resources over HTTP from a static web page without ever having to reload the page itself. This library is meant to simplify and unify the code necessary to successfully send and receive simple data via XMLHTTP.
Taconite is a framework that simplifies the creation of Ajax enabled Web applications. It’s a very lightweight framework that automates the tedious tasks related to Ajax development, such as the creation and management of the XMLHttpRequest object and the creation of dynamic content.
AjaxCaller is a thin XMLHttpRequest wrapper used in all the AjaxPatterns demos. The focus is on ease-of-use and full HTTP method support.
The XmlRequest library contains a two public request functions, getXml and postXml, that may be used to send synchronous and asynchronous XML Http requests from Internet Explorer and Mozilla.
Sajax is an open source tool to make programming websites using the Ajax framework — also known as XMLHTTPRequest or remote scripting — as easy as possible. Capable of stubbing calls to numerous server-side platforms: ASP/ ColdFusion/ Io/ Lua/ Perl/ PHP/ Python/ Ruby
A small library for making dynamic HTML programming easy and fun.
moo.ajax is a very simple ajax class, to be used with prototype.lite from moo.fx.
PHP based AJAX Frameworks
XOAD, formerly known as NAJAX, is a PHP based AJAX/XAP object oriented framework that allows you to create richer web applications.
A PHP 5 Development Framework inspired by Rails. It has integrated database abstraction and support for AJAX. Installation is fairly easy. Symfony is aimed at building robust applications in an enterprise context. This means that you have full control over the configuration: from the directory structure to the foreign libraries, almost everything can be customized. To match your enterprise’s development guidelines, symfony is bundled with additional tools helping you to test, debug and document your project.
OSFlash – Flashjs
Java based AJAX Frameworks
ZK is an AJAX-based solution for developing Web applications in Java. ZK includes an event-driven engine to automate interactivity, and a rich set of XUL-based components.
I dont know much about Java. Please suggest some more Java based AJAX frameworks.
Not enough? Check out JSAN