Sproutcore
JavaScript Application Framework - JS library only
Terrificjs
Terrific JavaScript Framework
PubNub
PubNub makes Real-time Real Easy with a Simple Communications API. Two Functions: Send/Receive (Publish/Subscribe). We provide a web-service API for businesses to build scalable Data Push communication apps on Mobile, Tablet and Web. Bidirectional JSON.
Optics
Profunctor implementation of Lenses, Prisms, Traversals, Isos, etc.
Stimulus
A modest JavaScript framework for the HTML you already have
Spine
Lightweight MVC library for building JavaScript applications
Montage
Core framework: Montage simplifies the development of rich HTML5 applications by providing modular components, real-time two-way data binding, CommonJS dependency management, and many more conveniences. Join us on irc.freenode.net#montage or https://groups.google.com/d/forum/montagejs
Chaplin
An Application Architecture Using Backbone.js
Xsm
State Management made eXtraordinarily simple and effective for Angular, React, and Vue
Winjs
WinJS project by Microsoft Open Technologies
Overmind
Overmind - Frictionless state management
Lovli.js
A boilerplate for developing react+redux applications with rethinkdb/horizon as realtime database and express for the server.
Ethvtx
🌀Ethereum-Ready & Framework-Agnostic Redux Store Configuration
Rill
:left_right_arrow: Universal web application framework.
Pts
A library for visualization and creative-coding
Componentjs
ComponentJS -- Powerful run-time Component System for structuring HTML5-based Rich Clients
Ractive
Next-generation DOM manipulation