Angular is the definite ruler in the JS world. Developed and maintained by Google, it is a popular open-source front-end development framework. Many developers and software engineers use Angular.js to develop single-page web applications.
Ember is the framework designed “for creating ambitious web applications.” Apple Music, a music streaming service is one of the most notable examples of an app built with Ember. It has well-defined best practices helping developers to build highly functional apps.
Another framework gaining a lot of popularity is Meteor.js. It is developed by the Meteor Development Group and is written using Node.js. With its huge library and packages, meteor is apt for software, mobile, and cross-platform development.
Vue.js is a progressive framework used for building user interfaces. Its biggest advantage is its small size and the fact that it is extremely easy to understand making it a perfect choice to develop sophisticated single-page applications when combined with modern tools and supported libraries.
Aurelia.js is the next generation client-side JS framework making a solid foothold for itself to develop a variety of application-like desktop applications using Electron, mobile apps using Cordova/CrossWalk/Phonegap and modern Browser apps. The best part is that it uses simple conventions to reduce the number of code developers and is compliant with new standards.