PreloadJS
PreloadJS makes preloading assets & getting aggregate progress events easier in JavaScript. It uses XHR2 when available, and falls back to tag-based loading when not.
Conditioner
Frizz Free, Environment-aware, JavaScript Modules
Backbone Layout Manager
A layout and template manager for Backbone.js applications.
Routie
a tiny javascript hash router
Jwerty
Awesome handling of keyboard events
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.
When
A solid, fast Promises/A+ and when() implementation, plus other async goodies.
Sticky Kit
A jQuery plugin for creating smart sticky elements
Robotjs
Node.js Desktop Automation.
Lucid Js
LucidJS is a chainable event emitter library. It offers several unique features such as set events, emitter piping, DOM node encapsulation, sub events, along with the usual event triggering and binding. LucidJS emitters also feature meta events that allow listening for event binding and event triggering. LucidJS works in both the browser and node.js.
Meld
AOP for JS with before, around, on, afterReturning, afterThrowing, after advice, and pointcuts
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.
Gas
Google Analytics on Steroids. A Google Analytics implementation with more power features.
Eve.js
A <3kb JavaScript file providing three simple methods to organize code into CSS namespaces which magically restrict code to the current context, allowing for dramatic reductions to code size and development time.
Contra
Asynchronous flow control with a functional taste to it
Davis.js
RESTful degradable JavaScript routing using pushState
Fluxible
A pluggable container for isomorphic flux applications