library
moo.fx - size does matter
moo.fx, a superlightweight javascript effects library
Cappuccino Web Framework
Cappuccino is an open source framework that makes it easy to build desktop-caliber applications that run in a web browser.
Sencha - Mobile JavaScript - Ext JS, Ext GWT and Sencha Touch
Ext (X-t) is a JavaScript library for building interactive web applications originally built as an add-on library extension of YUI by Jack Slocum, Ext includes interoperability with jQuery and Protot ...
AJAX.OOP JavaScript Framework
AJAX.OOP is a fast and scalable JavaScript Library that provides you with possibility to create JavaScript/Ajax components in object oriented way.
DHTMLX - JavaScript Ajax Library -
Build killer web apps with DHTMLX Ajax toolkit! Professional JavaScript UI components that bring desktop-like functionality to web interface.
Ajax AC
Open-source written in PHP framework for creating Asynchronous JavaScript And XML / JavaScript applications.
Fleegix.js JavaScript Toolkit
Fleegix.js provides an extremely lightweight, cross-browser set of JavaScript tools for building dynamic Web-app UIs.
The Dojo Toolkit
Dojo Toolkit is an open source modular JavaScript library (or more specifically JavaScript toolkit) featuring DHTML and AJAX functions.
Open Rico
The core of Rico 2.0 has been designed to enable custom components to be more easily built and is provided free and open-source.
script.aculo.us - web 2.0 javascript
Powerful framework library extended and improved by open-source contributors.