History.js gracefully supports the HTML5 History/State APIs (pushState, replaceState, onPopState) in all browsers. Including continued support for data, titles, replaceState. Supports jQuery, MooTools and Prototype.

Miso is an open source toolkit designed to expedite the creation of high-quality interactive storytelling and data visualisation content.

You've heard of Browser Detection and Feature Detection. Form Factor Detection is a third way, providing an avenue to manage conceptually distinct user interfaces. It doesn't eliminate the need for the first two approaches, but you use them in the context of a particular form factor's interface.

The Closure Library is a broad, well-tested, modular, and cross-browser JavaScript library. You can pull just what you need from a large set of reusable UI widgets and controls, and from lower-level utilities for DOM manipulation, server communication, animation, data structures, unit testing, rich-text editing, and more.

Hieroglyph lets you turn a directory of SVG icons into an SVG font.

Standalone test spies, stubs and mocks for JavaScript. No dependencies, works with any unit testing framework.

It's ironic, but this actually allows AMD users to use backbone in an amd environment without hacking the source.

Backbone checks for root._ but underscore didn't export to root when define was detected, and since underscore is a dependency it was all busted.

Now you can write a little shim to get all the libs you need for backbone w/o touching the source of any of them.

define ['vendor/underscore', 'vendor/jquery', 'order!vendor/backbone'] -> Backbone

task.js is an experimental library for ES6 that makes sequential, blocking I/O simple and beautiful, using the power of JavaScript’s new yield operator.

Tasks are interleaved like threads, but they are cooperative rather than pre-emptive: they block on promises with yield.