React is arguably one of the most widely used open source projects in the world. Created by Facebook, this library makes creating user interfaces in web applications effortless. It also makes developing new features extremely easy, and developers do not have to worry about changing any pre-existing code.
React Native, which is built on top of React, extends the functionalities of React to mobile applications, making React a widely used platform for development.
Web applications developed by Angular are cross-platform, in that they are compatible across a wide class of devices, be it Mobiles, Desktops or Tablets. AngularJS is on par with the other frameworks in terms of speed, performance and scalability.
AngularJS advertises to provide huge data requirements and a scalable infrastructure that supports large-scale applications, such as that of Google's.
The npm stands for Node Package Manager, and it does exactly that. It manages your installed Node.js packages and makes it easier to install other packages.
Ember.js is one of the most developer-friendly frameworks out there, taking only minutes for a new developer to build an application. Many popular websites like Netflix use Ember.
Unlike other frameworks, Meteor is not limited to front-end web applications. Meteor enables rapid prototyping and automatic catering of data changes. It also provides a large interface of enhancements readily available for many use cases.