Ember.js is an open-source JavaScript web framework, based on the Model–view–viewmodel (MVVM) pattern. It allows developers to create scalable single-page web applications. Developed by emberjs
License: Open Source
ExpressJS is a lightweight and minimalist web framework for Node.js, ideal for building RESTful APIs and web applications, while Ember.js is a robust front-end framework that emphasizes convention over configuration, making it suitable for ambitious single-page applications.