Mithril.js
A Javascript Framework for Building Brilliant Applications
Vue
Intuitive, fast & composable MVVM for building interactive interfaces.
Crypto Js
JavaScript library of crypto standards.
Spine
Lightweight MVC library for building JavaScript applications
Venus.js
where bugs go to die
Aurelia Framework
The aurelia framework brings together all the required core aurelia libraries into a ready-to-go application-building platform.
jsMessage
Custom messages, alerts, confirmations
Express
Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
Nuxt.js
The Vue.js Developers Framework
Hoodie.js
hoodie super power to the frontend!
Jsblocks
Better MV-ish Framework
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.
Gijgo
Gijgo - Free Javascript Controls
Firebase Js Sdk
Firebase Javascript SDK
Riotjs
The 1kb client side MV* library