Knockout
Knockout makes it easier to create rich, responsive UIs with JavaScript
Delorean
An Agnostic, Complete Flux Architecture Framework
Jsblocks
Better MV-ish Framework
Black Hole.js
Renders black hole gravitational lensing effects in an image canvas using WebGL, glfx.js, and numeric.js
Pencilblue
Full stack online publishing and CMS for Node.js
Blizzard.js
A promise-based Node.JS library for the Blizzard Battle.net Community Platform API
Skel
A lightweight responsive framework for the www
Dojo
Dojo saves you time and scales with your development process, using web standards as its platform. It’s the toolkit experienced developers turn to for building high quality desktop and mobile web applications.
Postal.js
JavaScript pub/sub library supporting some advanced subscription features, plus message capture and replay
Sammy
Sammy is a tiny javascript framework built on top of jQuery, It's RESTful Evented Javascript.
Tungstenjs
Tungsten.js is a modular framework for creating web UIs with high-performance rendering on both server and client.
YUI3
YUI is a free, open source JavaScript and CSS library for building richly interactive web applications.
Impress
Impressive totalitarian style Multipurpose Application Server for node.js. All decisions are made. Solutions are scaled. Tools are provided and optimized for high load. Ready for applied development and production.
Hoodie.js
hoodie super power to the frontend!
Flux
Application Architecture for Building User Interfaces
jsMessage
Custom messages, alerts, confirmations