Mag.js
MagJS - Modular Application Glue
Hello.js
A Javascript RESTFUL API library for connecting with OAuth2 services, such as Google+ API, Facebook Graph and Windows Live Connect
Object.observe
Object.observe polyfill/shim trying to be compliant
HtmlJs
HTML render engine and data binding (MVVM)
Es2015 I18n Tag
ES2015 template literal tag for i18n and l10n (translation and internationalization)
Onionskin
A client- and server-side multi-layer cache manager library
Cram
Simple AMD and CommonJS module bundler.
T Former.js
tFormer.js - Empower your HTML forms
Wordcount.js
Calculate file newlines, word, and byte counts on client side using HTML5 File API. (Emulates Linux's wc command)
Tock
Timer Object/Class. Kickass!
Amaran Js
Nice, sleek and stylish notifications.
Scale App
scaleApp is a JavaScript framework for scalable One-Page-Applications
Vide
Easy as hell jQuery plugin for video backgrounds.
Sammy
Sammy is a tiny javascript framework built on top of jQuery, It's RESTful Evented Javascript.
Respond
A fast & lightweight polyfill for min/max-width CSS3 Media Queries (for IE 6-8, and more)
Postal.js
JavaScript pub/sub library supporting some advanced subscription features, plus message capture and replay
Path.js
Simple, lightweight routing for web browsers