JSwiki

• jQuery

• dojotoolkit

• EnyoJS - Framework from HP WebOS

• jquip - jQuery in parts

• Sammy - Built on top of jQuery

• Prototype - See also script.aculo.us

• MooTools

• Spry

• Glow

• Ext JS

• qooxdoo

• dhtmlx

• YUI

• Ojay - YUI wrapper (provides chaining etc.)

• Uize - Source

• Midori

• RightJS

• AngularJS

• Atoms.js - JavaScript UI Framework inspired from Flex and Silverlight.

• ActiveJS

• Ender - Novel, open, next level, modular JavaScript. no-library library

• Erbix

• Atom - Atom is compact JavaScript framework oriented on modern browsers, which allows to support quite broad list of features without keeping a lot of cruft necessary to implement them in old browsers. MIT/LGPL.

• batman.js

• Chaplin: great application structure on top of backbone.js.

• Google Closure Library

• neon - The fat-free open source Javascript framework. Weighs less than 4k minified and gzipped.

• Asana Luna

• lovely.io

• Vanilla JS

Full-stack frameworks (both client- and server-side)

• Meteor

• Nowjs

Single Page Application Frameworks

• faux - Uses Backbone.js. Demo application.

• scaleApp - scalable with loosely coupled modules. Demo application.

• OriginJS - A very simple and flexible yet powerful client side router.

Other

• AmplifyJS - a set of components designed to solve common web application problems with a simplistic API

Obsolete

• Archetype

• b9j (not available anymore?) - Source

• June

• SimpleJS

References

• 10 Promising JavaScript Frameworks

• JavaScript Framework Matrix

• Comparison of JavaScript Frameworks

• 20 JavaScript Frameworks Worth Checking Out