Durandal
A cross-device, cross-platform client framework written in JavaScript and designed to make building Single Page Applications (SPAs) easy to create and maintain.
Redux Side Effects
Redux toolset for keeping all the side effects inside your reducers while maintaining their purity.
Backbone Marionette
Make your Backbone.js apps dance with a composite application architecture!
Flakes
Flakes is an Admin Template Framework. A combination of CSS Libraries, JavaScript Libraries and Design files that help you build business tools very quickly.
Bootstrap.native
If you are looking for Bootstrap without jQuery or vanilla Javascript for Bootstrap, this is the place to get started.
Batman
Fighting Crime and Kicking Apps
Angular Meteor
Combining the simplicity and power of AngularJS and Meteor
Sproutcore
JavaScript Application Framework - JS library only
Derby
MVC framework making it easy to write realtime, collaborative applications that run in both Node.js and browsers
Ext JS
Repository for extjs to be used as a git-submodule in projects
Backbone
Give your JS App some Backbone with Models, Views, Collections, and Events
Aurelia Framework
The aurelia framework brings together all the required core aurelia libraries into a ready-to-go application-building platform.
Alloy Ui
Alloy is a UI metaframework that provides a consistent and simple API for building web applications across allthree levels of the browser: structure, style and behavior.
Adonis Framework
NodeJs Web Application Framework. Makes it easy for you to write webapps with less code :smiley:
Montage
Core framework: Montage simplifies the development of rich HTML5 applications by providing modular components, real-time two-way data binding, CommonJS dependency management, and many more conveniences. Join us on irc.freenode.net#montage or https://groups.google.com/d/forum/montagejs
Riotjs
The 1kb client side MV* library
Frontless
Build universal JS applications with Riot.JS