Dna.js
An uncomplicated user interface library for semantic templates
Mustache.js
Minimal templating with {{mustaches}} in JavaScript
Serenade.js
Client side MVC framework
Backbone Deep Model
Improved support for models with nested attributes.
Js Cache
jsCache is a javascript library that enables caching of javascripts, css-stylesheets and images using my localStorage polyfill. This is especially useful when serving your website for mobile phones, which have limited HTTP caching available, but also speeds up your site in an ordinary web browser as it saves HTTP requests and loads all files asynchronously.
Alertify.js
JavaScript Alert/Notification System
Batman
Fighting Crime and Kicking Apps
Node Browserify
browser-side require() the node.js way
JayData
JayData is a unified data access library for JavaScript to CRUD data from different sources like WebSQL/SQLite, IndexedDB, MongoDb, ASP.NET WebAPI, OData, HTML5 localStorage, Facebook or YQL. The library can be integrated with KendoUI, Knockout.js, Handlebars.js or Sencha Touch 2 and can be used on Node.js as well.
Gas
Google Analytics on Steroids. A Google Analytics implementation with more power features.
Aura
A scalable, event-driven JavaScript architecture for developing widget-based applications. Works with Backbone.js and other frameworks.
Alloy Ui
Alloy is a UI metaframework that provides a consistent and simple API for building web applications across allthree levels of the browser: structure, style and behavior.
jTypes
jTypes is the most comprehensive and robust JavaScript library for overcoming differential inheritance with prototype-based objects. Its lightweight yet powerful design provides web programmers on any platform or browser the ability to emulate classical inheritance where objects are defined by classes.
Simplecart
A simple javascript shopping cart that easily integrates with your current website.
Mask Js
Zen Coding | Markup | Template | HMVC
JS Signals
Custom Event/Messaging system for JavaScript inspired by AS3-Signals
Tangle
a JavaScript library for reactive documents