Vis
Dynamic, browser-based visualization library
Loglevel
Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods
Bacon.js
FRP (functional reactive programming) library for Javascript
Backbone React Component
A bit of nifty glue that automatically plugs your Backbone models and collections into your React components, on the browser and server
Backbone Associations
Create object hierarchies with Backbone models; Respond to hierarchy changes using regular Backbone events.
jStorage
jStorage is a simple key/value database to store data on browser side. As a bonus it is also a local pubsub platform to sync data between tabs/windows
Steal
Gets JavaScript
Robotjs
Node.js Desktop Automation.
Bottlejs
A powerful, extensible dependency injection micro container for JavaScript applications
Inject
AMD and CJS dependency management in the browser
Mediator.js
An implementation of the mediator pattern for asynchronous events in Javascript
Curl
A small, fast module and resource loader with dependency management. (AMD, CommonJS Modules/1.1, CSS, HTML, etc.)
Lunr.js
A bit like Solr, but much smaller and not as bright
Page.js
Micro client-side router inspired by the Express router (~1200 bytes)
Webshim
Webshims Lib is a modular capability-based polyfill-loading library
Tangle
a JavaScript library for reactive documents
JS Signals
Custom Event/Messaging system for JavaScript inspired by AS3-Signals