Below is a list of the top 20 alternatives to the Angular framework. Each entry includes a brief description, along with URLs for the official GitHub repository, the official website, and the official documentation.

This list presents alternatives to Angular, providing diverse options for web development, ranging from libraries focused on the view layer to full-fledged frameworks for building complex applications.

• Description: A declarative, efficient, and flexible JavaScript library for building user interfaces.
• GitHub: s://github.com/facebook/react
• Website: s://reactjs.org/
• Documentation: s://reactjs.org/docs/getting-started.html

• Description: An approachable, performant, and versatile framework for building web user interfaces.
• GitHub: s://github.com/vuejs/vue
• Website: s://vuejs.org/
• Documentation: s://vuejs.org/v2/guide/

• Description: A radical new approach to building user interfaces, where the work is done at compile time to remove the need for a virtual DOM.
• GitHub: s://github.com/sveltejs/svelte
• Website: s://svelte.dev/
• Documentation: s://svelte.dev/docs

• Description: A framework for ambitious web developers, providing a strong convention over configuration philosophy.
• GitHub: s://github.com/emberjs/ember.js
• Website: s://emberjs.com/
• Documentation: s://guides.emberjs.com/

• Description: A fast 3kB alternative to React with the same modern API, focusing on performance and size.
• GitHub: s://github.com/preactjs/preact
• Website: s://preactjs.com/
• Documentation: s://preactjs.com/guide/v10/getting-started

• Description: Gives structure to web applications by providing models with key-value binding and custom events.
• GitHub: s://github.com/jashkenas/backbone
• Website: ://backbonejs.org/
• Documentation: ://backbonejs.org/#Getting-started

• Description: A collection of modern JavaScript modules, designed to empower you to build applications with next-generation standards.
• GitHub: s://github.com/aurelia/framework
• Website: s://aurelia.io/
• Documentation: s://aurelia.io/docs

• Description: A modern client-side JavaScript framework for building Single Page Applications.
• GitHub: s://github.com/MithrilJS/mithril.js
• Website: s://mithril.js.org/
• Documentation: s://mithril.js.org/api.html

• Description: A rugged, minimal framework for composing JavaScript behavior in your HTML.
• GitHub: s://github.com/alpinejs/alpine
• Website: s://alpinejs.dev/
• Documentation: s://alpinejs.dev/start

• Description: A simple base class for creating fast, lightweight web components.
• GitHub: s://github.com/lit/lit
• Website: s://lit.dev/
• Documentation: s://lit.dev/docs/

• Description: A JavaScript framework with modest ambitions designed to enhance HTML with just enough behavior.
• GitHub: s://github.com/stimulusjs/stimulus
• Website: s://stimulus.hotwire.dev/
• Documentation: s://stimulus.hotwire.dev/reference

• Description: A free and open-source web framework that enables developers to create web apps using C# and HTML.
• GitHub: s://github.com/dotnet/aspnetcore
• Website: s://blazor.net/
• Documentation: s://docs.microsoft.com/en-us/aspnet/core/blazor/?view=aspnetcore-5.0

• Description: A simple and elegant component-based UI library.
• GitHub: s://github.com/riot/riot
• Website: s://riot.js.org/
• Documentation: s://riot.js.org/documentation /

• Description: Helps you create rich, responsive display and editor user interfaces with a clean underlying data model.
• GitHub: s://github.com/knockout/knockout
• Website: s://knockoutjs.com/
• Documentation: s://knockoutjs.com/documentation/introduction.html

• Description: A delightful language for reliable web applications, generating JavaScript with a strong emphasis on simplicity and quality tooling.
• GitHub: s://github.com/elm/compiler
• Website: s://elm-lang.org/
• Documentation: s://guide.elm-lang.org/

• Description: A React-based, GraphQL powered, static site generator that gives you everything you need to build high-performance websites and apps.
• GitHub: s://github.com/gatsbyjs/gatsby
• Website: s://www.gatsbyjs.com/
• Documentation: s://www.gatsbyjs.com/docs/

• Description: A React framework for building single-page JavaScript applications with server rendering and abstracted client-side routing.
• GitHub: s://github.com/vercel/next.js
• Website: s://nextjs.org/
• Documentation: s://nextjs.org/docs

• Description: An intuitive Vue framework that simplifies the development of universal or single-page Vue apps.
• GitHub: s://github.com/nuxt/nuxt.js
• Website: s://nuxtjs.org/
• Documentation: s://nuxtjs.org/docs/2.x/get-started/installation

• Description: A Vue.js framework that provides a rich set of components and tools for developers to quickly build responsive websites, PWAs, SSR applications, mobile, and desktop apps.
• GitHub: s://github.com/quasarframework/quasar
• Website: s://quasar.dev/
• Documentation: s://quasar.dev/start/pick-quasar-flavour

• Description: A framework for building high-performance universal web apps with Svelte, featuring server-side rendering and static site generation.
• GitHub: s://github.com/sveltejs/sapper
• Website: s://sapper.svelte.dev/
• Documentation: s://sapper.svelte.dev/docs

This list provides a comprehensive overview of the landscape of modern web development frameworks and libraries, offering various approaches to building web applications that cater to different preferences and requirements.

Each alternative offers unique features and benefits, making them suitable for different web development needs, from single-page applications (SPAs) to server-side rendered (SSR) websites and progressive web apps (PWAs).