Bottlejs
A powerful, extensible dependency injection micro container for JavaScript applications
Lazy.js
Like underscore.js, but lazier
Libretaxi
LibreTaxi, free and open source Uber/Lyft alternative to connect passengers and drivers.
Alertify.js
JavaScript Alert/Notification System
Mediator.js
An implementation of the mediator pattern for asynchronous events in Javascript
Invisible
Invisible.js: Reusable models for the client and the server
Stampit
Create objects from reusable, composable behaviors.
Sticky Kit
A jQuery plugin for creating smart sticky elements
Connective
agent-based reactive programming library for typescript
Backbone Layout Manager
A layout and template manager for Backbone.js applications.
Backbone Deep Model
Improved support for models with nested attributes.
Radio
Dependency-free Chainable Publish/Subscribe Library for Javascript
Jquery Timeago
Timeago is a jQuery plugin that makes it easy to support automatically updating fuzzy timestamps (e.g. "4 minutes ago").
Lmd
LMD: Lazy Module Declaration. Be lazy: lazy load @ lazy init
Q
A tool for making and composing asynchronous promises in JavaScript
Bacon.js
FRP (functional reactive programming) library for Javascript
Backbone.stickit
Backbone data binding, model binding plugin. The real logic-less templates.