Marko template engine
A state controller with its own debugger
Can do JS, better, faster, easier.
The 1kb client side MV* library
Ajax with less suck - (and node.js HTTP client to match)
ComponentJS -- Powerful run-time Component System for structuring HTML5-based Rich Clients
Set of UI interactions, effects and utilities components library using jQuery.
Dynamic, browser-based visualization library
One-way data binding for web applications.
Blueprint for modern web development
:left_right_arrow: Universal web application framework.
Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jade, coffee, css, less, ... and your custom stuff.