JavaScript framework may not make you a better web designer or web developers, but it will make you more efficient. That alone should be reason enough to choose JavaScript framework, or library if you want. Unless you decide to build their own, there are many options available to developers. This is a list of 4 best open source javascript framework in my opinion

Ample SDK

Ample SDK is a standard-based cross-browser JavaScript GUI Framework for building Rich Internet Applications. It employs XML technologies (such as XUL, SVG or HTML5) for UI layout, CSS for UI style and JavaScript for application logic. It equalizes browsers and brings technologies support to those missing any.

Ajax.org Platform

Ajax.org PlatForm is a pure javascript application framework for creating real-time collaborative applications that run in the browser. Ajax.org Platform radically changes the way you write applications with Live markup, Markup and JSON api, Collaborative backbone. Ajax.org Platform 100% open source software

UIZE

UIZE (pronounced “you eyes”) is a powerful, open source, object oriented JavaScript framework – supporting widgets, AJAX, DOM, templates, and more.

Hemlock

Hemlock is an open-source framework that combines the richness of Flash with the scalability of XMPP, facilitating a new class of web applications where multiple users can interact in real time. Games, workspace collaboration, educational tools

Tags: javascript framework, open source