Robotjs
Node.js Desktop Automation.
Onfire.js
onfire.js is a simple events dispatcher subscribe / publish library (< 1kb). async, simple and usefull.
Lodash
An alternative to Underscore.js, delivering consistency, customization, performance, and extra features.
Diagram
JS tool for making node graphs. Inspired by dependency graph
Cram
Simple AMD and CommonJS module bundler.
Webshim
Webshims Lib is a modular capability-based polyfill-loading library
Tock
Timer Object/Class. Kickass!
Cellx
Ultra-fast implementation of reactivity for javascript
Buster
A powerful suite of automated test tools for 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.
UI Router
The de-facto solution to flexible routing with nested views
Backbone Layout Manager
A layout and template manager for Backbone.js applications.
Refluxjs
A simple library for uni-directional dataflow application architecture inspired by ReactJS Flux
Stately.js
Stately.js is a JavaScript based finite-state machine (FSM) engine for Node.js and the browser.
Vue Moment
Handy Moment.js filters for your Vue.js project.
Then.js
The fastest, smallest, fully compatible, full-featured asynchronous module!
JS Signals
Custom Event/Messaging system for JavaScript inspired by AS3-Signals