Hoodie.js
hoodie super power to the frontend!
Express
Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
Dozerjs
Foundational Framework for NodeJS Web Services
Fishbone.js
A super lightweight (½kb) JavaScript library with automatic method chaining, automatic context binding, event support and simple inheritance. c-{{{-<
Riotjs
The 1kb client side MV* library
Winjs
WinJS project by Microsoft Open Technologies
Famous
Famo.us is a powerful JavaScript framework designed to build rich, interactive web applications. It is the only framework that provides an open source 3D layout engine fully integrated with a 3D physics-based animation engine that can render to DOM, Canvas, or WebGL. Famo.us is currently in public beta.
Pagerjs
The Single Page Application Framework for KnockoutJS
Mithril.js
A Javascript Framework for Building Brilliant Applications
Vue
Intuitive, fast & composable MVVM for building interactive interfaces.
Bem Core
BEM Core Library
Serenade.js
Client side MVC framework
Componentjs
ComponentJS -- Powerful run-time Component System for structuring HTML5-based Rich Clients
Terrificjs
Terrific JavaScript Framework
Hasher
Browser history manager for rich media websites
Crossroads.js
JavaScript Routes
Ractive
Next-generation DOM manipulation