Here are some popular JavaScript frameworks(js frameworks):

1. React.js: A front-end library developed by Facebook, commonly used for building web applications and user interfaces.
2. Angular.js: A comprehensive front-end framework developed by Google, used for building complex, single-page web applications.
3. Vue.js: A progressive front-end framework used for building user interfaces and single-page applications.
4. Ember.js: A full-featured front-end framework used for building complex web applications.
5. Backbone.js: A lightweight front-end framework that provides structure to web applications using models, collections, and views.
6. Meteor.js: A full-stack framework that integrates with Node.js, allowing developers to build real-time, responsive web applications.
7. Express.js: A minimalist web framework for Node.js used to build fast and scalable web applications.
8. Nest.js: A server-side framework built on top of Node.js that uses TypeScript and provides a modular, scalable architecture for building enterprise-level applications.