Knockout
Knockout makes it easier to create rich, responsive UIs with JavaScript
Ink
An HTML5/CSS3 framework used at SAPO for fast and efficient website design and prototyping
Bem Core
BEM Core Library
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.
Xsm
State Management made eXtraordinarily simple and effective for Angular, React, and Vue
Flagsmith Frontend
Web App and Mobile App for Flagsmith
Crossroads.js
JavaScript Routes
Componentjs
ComponentJS -- Powerful run-time Component System for structuring HTML5-based Rich Clients
Pencilblue
Full stack online publishing and CMS for Node.js
Remote Storage
Client-side Javascript library to make apps compatible with a remote storage.
Inferno
An extremely fast, React-like JavaScript library for building modern user interfaces
Frontless
Build universal JS applications with Riot.JS
Riotjs
The 1kb client side MV* library
Express
Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
Spine
Lightweight MVC library for building JavaScript applications
Redux Elm
The Elm Architecture in JavaScript http://salsita.github.io/redux-elm/