Riotjs
The 1kb client side MV* library
Queue
Yet another asynchronous helper library for JavaScript. 387 bytes minified and gzipped!
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.
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
Ractive
Next-generation DOM manipulation
Functional Js
A functional js library that facilitates currying and point-free / tacit programming
Nuxt.js
The Vue.js Developers Framework
Angular Meteor
Combining the simplicity and power of AngularJS and Meteor
Terrificjs
Terrific JavaScript Framework