Queen
A platform for running scripts on many browsers
Mediator.js
An implementation of the mediator pattern for asynchronous events in Javascript
Sticky Kit
A jQuery plugin for creating smart sticky elements
Conditioner
Frizz Free, Environment-aware, JavaScript Modules
Bottlejs
A powerful, extensible dependency injection micro container for JavaScript applications
Lazy.js
Like underscore.js, but lazier
Q
A tool for making and composing asynchronous promises in JavaScript
Contra
Asynchronous flow control with a functional taste to it
Connective
agent-based reactive programming library for typescript
Backbone Layout Manager
A layout and template manager for Backbone.js applications.
Page.js
Micro client-side router inspired by the Express router (~1200 bytes)
Amplify
AmplifyJS is a set of components for data management and application communication.
Fluxxor
Flux architecture tools for React
Redux Loop
A port of elm-effects and the Elm Architecture to Redux that allows you to sequence your effects naturally and purely by returning them from your reducers.
Bacon.js
FRP (functional reactive programming) library for Javascript
Rx Js
The Reactive Extensions for JavaScript
Vis
Dynamic, browser-based visualization library