Webshim
Webshims Lib is a modular capability-based polyfill-loading library
Buster
A powerful suite of automated test tools for JavaScript.
Min Pub Sub
198 byte publish/subscribe messaging micro-framework
Platform.js
A platform detection library that works on nearly all JavaScript platforms.
Steal
Gets JavaScript
Angular History
A history service for AngularJS. Undo/redo, that sort of thing. Has nothing to do with the "back" button, unless you want it to.
Q
A tool for making and composing asynchronous promises in JavaScript
Keymaster
A simple micro-library for defining and dispatching keyboard shortcuts. It has no dependencies.
Curl
A small, fast module and resource loader with dependency management. (AMD, CommonJS Modules/1.1, CSS, HTML, etc.)
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.
Backbone Deep Model
Improved support for models with nested attributes.
History.js
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. For HTML5 browsers this means that you can modify the URL directly, without needing to use hashes anymore. For HTML4 browsers it will revert back to using the old onhashchange functionality.
Then.js
The fastest, smallest, fully compatible, full-featured asynchronous module!
Speakingurl
Generate of so called "static" or "nice-looking" or "slug" or "SpeakingURL" from a string.
Fetchival
window.fetch wrapper for writing simple and expressive requests
Egjs
Set of UI interactions, effects and utilities components library using jQuery.