Boiler
Boiler is a utility library that makes every day tasks in JavaScript easier by providing over 115 methods that work on arrays, collections, functions, numbers, objects, and strings.
Use.js
An AMD/RequireJS plugin for consuming incompatible JavaScript files.
Stampit
Create objects from reusable, composable behaviors.
Modernizr
Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.
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.
Twitterlib
Twitter JavaScript API library
Pilot
Pilot — multifunction JavaScript router.
Platform.js
A platform detection library that works on nearly all JavaScript platforms.
Bootstrap Ajax
A library for adding declarative ajax functionality to your website
Keymaster
A simple micro-library for defining and dispatching keyboard shortcuts. It has no dependencies.
Mousetrap
Simple library for handling keyboard shortcuts in Javascript
Min Pub Sub
198 byte publish/subscribe messaging micro-framework
ifvisible.js
Checks if the current page is visible or not
Redux Loop
A port of elm-effects and the Elm Architecture to Redux that allows you to sequence your effects naturally and purely by returning them from your reducers.
Gas
Google Analytics on Steroids. A Google Analytics implementation with more power features.
Curl
A small, fast module and resource loader with dependency management. (AMD, CommonJS Modules/1.1, CSS, HTML, etc.)