Highway
A fast, lightweight and simple Javascript routing library with no dependencies.
Componentjs
ComponentJS -- Powerful run-time Component System for structuring HTML5-based Rich Clients
Rest
RESTful HTTP client for JavaScript
Sproutcore
JavaScript Application Framework - JS library only
Prime
an OOP javascript library for node.js and the browsers
Queen
A platform for running scripts on many browsers
Kefir
A Reactive Programming library for JavaScript
Optics
Profunctor implementation of Lenses, Prisms, Traversals, Isos, etc.
Stapes
a (really) tiny Javascript MVC microframework
Functional Js
A functional js library that facilitates currying and point-free / tacit programming
Tweet
put twitter on your website with tweet, an unobtrusive javascript plugin for jquery
Backbone Nested
A plugin to make Backbone.js keep track of nested attributes.
Nunjucks
A jinja2-inspired templating system for javascript
Flow Js
Javascript Library for Multi-step Asynchronous Logic
Straw
Realtime processing framework for Node.js
Muuri
Responsive, sortable, filterable and draggable grid layouts
Black Hole.js
Renders black hole gravitational lensing effects in an image canvas using WebGL, glfx.js, and numeric.js