Top Alternatives to Polymer

AngularJS is a powerful open-source JavaScript framework developed by Google that enables developers to build dynamic single-page applications (SPAs). It simplifies front-end development by extending HTML with its directives and facilitating two-way data binding, promoting a Model-View-Controller (MVC) or Model-View-ViewModel (MVVM) architectural pattern.

Vue.js is an approachable, performant, and versatile framework for building modern user interfaces. It excels at creating single-page applications and complex web components, offering a gentle learning curve and excellent integration capabilities.

Ember.js is a robust, open-source JavaScript framework for building ambitious web applications. Based on the Model–View–ViewModel (MVVM) pattern, it provides developers with a structured approach to create scalable and maintainable single-page applications.

Materialize is a modern, responsive front-end CSS framework based on Google's Material Design principles. It offers a collection of ready-to-use components and styles to build visually appealing and highly functional websites and web applications quickly.

Backbone.js is a lightweight JavaScript framework providing structure to web applications. It organizes code using the Model-View-Presenter pattern, offering models with key-value binding and custom events, collections with rich API, views using declarative event handling, and RESTful JSON synchronization.

React is a declarative, component-based JavaScript library for building dynamic user interfaces, primarily for web and mobile applications. It enables developers to create predictable and efficient UIs by managing component states effectively.

KnockoutJS is a JavaScript library that helps you create rich, responsive display and editor user interfaces with a clean underlying data model. It leverages the Model-View-ViewModel (MVVM) pattern and features declarative data-binding.

Derby is a JavaScript framework for building modern, real-time web applications. It provides a complete solution for both the backend and frontend, emphasizing data synchronization and developer productivity through its unique architectural approach.

Aurelia is a modern, open-source JavaScript client framework designed for building robust and maintainable web, mobile, and desktop applications, emphasizing simplicity and Convention over Configuration.

Zepto.js is a minimalist JavaScript library specifically designed for mobile web browsers, offering a jQuery-compatible API for handling DOM manipulation, events, AJAX, and animations, while prioritizing small size and performance.