1. React

React is a popular JavaScript library developed by Facebook. It is used for building user interfaces and single-page applications. Learning React can greatly enhance your front-end development skills.

2. Vue.js

Vue.js is another great front-end JavaScript library that is gaining popularity. It is known for its simplicity and ease of use. It is a good choice for building interactive web interfaces.

3. Angular

Angular is a comprehensive front-end framework developed by Google. It is a powerful tool for building dynamic web applications. Learning Angular can give you a solid foundation in front-end development.

4. Svelte

Svelte is a relatively new front-end JavaScript framework that is gaining traction. It allows you to write your components in a more declarative way, resulting in faster and more efficient applications.

5. jQuery

jQuery is a fast and lightweight JavaScript library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development. It is still widely used in the industry.