Theory
Abstraction layer for cross platform JavaScript.
Serenade.js
Client side MVC framework
Lozad.js
🔥 Highly performant, light ~0.9kb and configurable lazy loader in pure JS with no dependencies for responsive images, iframes and more
Loglevel
Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods
Jquerypp
jQuery's missing utils and special events
Backbone Nested
A plugin to make Backbone.js keep track of nested attributes.
Simplate
A simple, but powerful, templating engine for JavaScript.
Query Loader2
Version of the QueryLoader by Gaya Design. Preload images with ease.
Nuclear Js
Reactive Flux built with ImmutableJS data structures. Framework agnostic.
Maria
The MVC framework for JavaScript applications. The real MVC. The Smalltalk MVC. The Gang of Four MVC.
Js Cache
jsCache is a javascript library that enables caching of javascripts, css-stylesheets and images using my localStorage polyfill. This is especially useful when serving your website for mobile phones, which have limited HTTP caching available, but also speeds up your site in an ordinary web browser as it saves HTTP requests and loads all files asynchronously.
Tweet
put twitter on your website with tweet, an unobtrusive javascript plugin for jquery
Optics
Profunctor implementation of Lenses, Prisms, Traversals, Isos, etc.
Muuri
Responsive, sortable, filterable and draggable grid layouts
Min Pub Sub
198 byte publish/subscribe messaging micro-framework
JayData
JayData is a unified data access library for JavaScript to CRUD data from different sources like WebSQL/SQLite, IndexedDB, MongoDb, ASP.NET WebAPI, OData, HTML5 localStorage, Facebook or YQL. The library can be integrated with KendoUI, Knockout.js, Handlebars.js or Sencha Touch 2 and can be used on Node.js as well.
Canjs
Can do JS, better, faster, easier.