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
Vue
Intuitive, fast & composable MVVM for building interactive interfaces.
Crypto Js
JavaScript library of crypto standards.
Spine
Lightweight MVC library for building JavaScript applications
Mithril.js
A Javascript Framework for Building Brilliant Applications
jsMessage
Custom messages, alerts, confirmations
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.
Venus.js
where bugs go to die
Jsblocks
Better MV-ish Framework
Express
Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
Firebase Js Sdk
Firebase Javascript SDK
Hoodie.js
hoodie super power to the frontend!
Stimulus
A modest JavaScript framework for the HTML you already have
Gijgo
Gijgo - Free Javascript Controls
Derby
MVC framework making it easy to write realtime, collaborative applications that run in both Node.js and browsers
Ember
Ember.js is a JavaScript framework that does all of the heavy lifting that you'd normally have to do by hand. There are tasks that are common to every web app; Ember.js does those things for you, so you can focus on building killer features and UI.