Backbone Marionette
Make your Backbone.js apps dance with a composite application architecture!
Layr
Dramatically simplify full‑stack development
Terrificjs
Terrific JavaScript Framework
Black Hole.js
Renders black hole gravitational lensing effects in an image canvas using WebGL, glfx.js, and numeric.js
Batman
Fighting Crime and Kicking Apps
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.
Canjs
Can do JS, better, faster, easier.
Sails
Realtime MVC Framework for Node.js
Aura
A scalable, event-driven JavaScript architecture for developing widget-based applications. Works with Backbone.js and other frameworks.
Blizzard.js
A promise-based Node.JS library for the Blizzard Battle.net Community Platform API
Bem Core
BEM Core Library
Firebase Js Sdk
Firebase Javascript SDK
Enyo
A JavaScript application framework emphasizing modularity and encapsulation
Wee
Blueprint for modern web development
Knockout
Knockout makes it easier to create rich, responsive UIs with JavaScript
Serenade.js
Client side MVC framework
Simplecart
A simple javascript shopping cart that easily integrates with your current website.