Tock
Timer Object/Class. Kickass!
Buster
A powerful suite of automated test tools for JavaScript.
Jquery Timeago
Timeago is a jQuery plugin that makes it easy to support automatically updating fuzzy timestamps (e.g. "4 minutes ago").
Machina.js
js ex machina - finite state machines in JavaScript
Meld
AOP for JS with before, around, on, afterReturning, afterThrowing, after advice, and pointcuts
Curl
A small, fast module and resource loader with dependency management. (AMD, CommonJS Modules/1.1, CSS, HTML, etc.)
Lazy.js
Like underscore.js, but lazier
Stampit
Create objects from reusable, composable behaviors.
Modernizr
Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.
Tangle
a JavaScript library for reactive documents
Jailed
Jailed - execute untrusted code with custom permissions
Jwerty
Awesome handling of keyboard events
Cellx
Ultra-fast implementation of reactivity for javascript
Loglevel
Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods
Cloudinary Js
Cloudinary JavaScript library
UI Router
The de-facto solution to flexible routing with nested views
Graphql Editor
GraphQL Visual Node Editor