Eve.js
A <3kb JavaScript file providing three simple methods to organize code into CSS namespaces which magically restrict code to the current context, allowing for dramatic reductions to code size and development time.
Fluxxor
Flux architecture tools for React
Webshim
Webshims Lib is a modular capability-based polyfill-loading library
Skel
A lightweight responsive framework for the www
Queue
Yet another asynchronous helper library for JavaScript. 387 bytes minified and gzipped!
Davis.js
RESTful degradable JavaScript routing using pushState
Buster
A powerful suite of automated test tools for JavaScript.
Theory
Abstraction layer for cross platform JavaScript.
Canjs
Can do JS, better, faster, easier.
Simplate
A simple, but powerful, templating engine for JavaScript.
Maria
The MVC framework for JavaScript applications. The real MVC. The Smalltalk MVC. The Gang of Four MVC.
Contra
Asynchronous flow control with a functional taste to it
Swig
Take a swig of the best template engine for JavaScript.
Muuri
Responsive, sortable, filterable and draggable grid layouts
Flow Js
Javascript Library for Multi-step Asynchronous Logic
Highway
A fast, lightweight and simple Javascript routing library with no dependencies.
Wee
Blueprint for modern web development