Formly :

JSON powered / Dynamic forms in Angular

Formly is a dynamic (JSON powered) form library for Angular that bring unmatched maintainability to your application's forms.

Features:

• Automatic forms generation
• Easy to extend with custom field type, validation, wrapper and extension.
• Support multiple schemas:
  • Formly Schema (core)
  • JSON Schema
• A bunch of themes, out of the box!
• Build on top of Angular Reactive Forms

URL: Formly Dev

Ant Design Mobile of Angular :

Angular implementation of Ant Design Mobile specification, serving Alibaba big data wireless service.

Features:

• An enterprise-class UI design language for Angular mobile web applications.
• The UI is fully Configurable and Scalable, easily adapt to all kinds of product style.
• Use TypeScript to develop, provide type definition files, support type and attribute smart tips for easy business development.
• Provide "Components are loaded on demand" / "Web page HD display" / "SVG Icon" optimization features, integrated development.
• Support running in Ionic.

URL: Ant Design Mobile for Angular Documentation

Angular UI Toolkit :

115 professionally built UI components that seamlessly integrate with Angular apps

The most complete set of professionally tested and commercially supported JS components. 115 professionally built UI components that seamlessly integrate with Angular apps.

Features:

1. No customization required
2. Lightweight and easy to use
3. Theming made easy
4. Access technical support
5. Access technical support
6. Back-end agnostic

URL: Angular UI Toolkit

Angular Material :

Material Design components for Angular

Sprint from Zero to App: Hit the ground running with comprehensive, modern UI components that work across the web, mobile and desktop.

Fast and Consistent: Finely tuned performance, because every millisecond counts. Fully tested across modern browsers.

Versatile: Themable, for when you need to stay on brand or just have a favorite color. Accessible and internationalized so that all users are welcome.

Optimized for Angular: Built by the Angular team to integrate seamlessly with Angular.

URL: Angular Material

Nebular :

Components, Auth & Security for your next Angular App

Moduler: Each feature is a separate npm module. Use only what you need.

Native: Components are written in pure Angular with no 3rd-party dependencies.

Open: Modules source code is free and available under MIT licence.

Extendable: Can be used in a mix with any UI library.

URL: Nebular Official Website