Then.js
The fastest, smallest, fully compatible, full-featured asynchronous module!
Meld
AOP for JS with before, around, on, afterReturning, afterThrowing, after advice, and pointcuts
Lips
Scheme based powerful lisp interpreter written in JavaScript
Weld
Template antimatter for Node.js (Browsers too!)
Rill
:left_right_arrow: Universal web application framework.
Routie
a tiny javascript hash router
Redux Elm
The Elm Architecture in JavaScript http://salsita.github.io/redux-elm/
Cellx
Ultra-fast implementation of reactivity for javascript
Serenade.js
Client side MVC framework
Venus.js
where bugs go to die
Tempo
Tempo is an easy, intuitive JavaScript rendering engine that enables you to craft data templates in pure HTML.
Webix
Stable releases of Webix UI - JavaScript library for building mobile and desktop web apps
Inject
AMD and CJS dependency management in the browser
Paperclip.js
reactive DOM template engine built for speed, and extensibility
Stapes
a (really) tiny Javascript MVC microframework
Gas
Google Analytics on Steroids. A Google Analytics implementation with more power features.
T.js
A tiny javascript templating framework in ~400 bytes gzipped