Foundation
The most advanced responsive front-end framework in the world. Quickly create prototypes and production code for sites and apps that work on any kind of device.
Fluxible
A pluggable container for isomorphic flux applications
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
JsRender
A light-weight but powerful templating engine, highly extensible, without DOM or jQuery dependency.
Bottlejs
A powerful, extensible dependency injection micro container for JavaScript applications
Lovli.js
A boilerplate for developing react+redux applications with rethinkdb/horizon as realtime database and express for the server.
Grips
Simple-logic templates
Q
A tool for making and composing asynchronous promises in JavaScript
Backbone.stickit
Backbone data binding, model binding plugin. The real logic-less templates.
Alertify.js
JavaScript Alert/Notification System
Hogan.js
A compiler for the Mustache templating language
Cloudinary Js
Cloudinary JavaScript library
Jsblocks
Better MV-ish Framework
Inferno
An extremely fast, React-like JavaScript library for building modern user interfaces
Vue
Intuitive, fast & composable MVVM for building interactive interfaces.
Is.js
Micro check library
Pusher Js
Pusher Javascript library