T.js
A tiny javascript templating framework in ~400 bytes gzipped
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
Backbone Nested
A plugin to make Backbone.js keep track of nested attributes.
Theory
Abstraction layer for cross platform JavaScript.
Query Loader2
Version of the QueryLoader by Gaya Design. Preload images with ease.
Inject
AMD and CJS dependency management in the browser
Canjs
Can do JS, better, faster, easier.
Muuri
Responsive, sortable, filterable and draggable grid layouts
Min Pub Sub
198 byte publish/subscribe messaging micro-framework
Maria
The MVC framework for JavaScript applications. The real MVC. The Smalltalk MVC. The Gang of Four MVC.
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.
Swig
Take a swig of the best template engine for JavaScript.
Lazy Load Xt
Lazy load XT is a jQuery plugin for images, videos and other media
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.
Hydra.js
Create a scalable, maintainable and module oriented system using Hydra.js