Sure, here's a list of 20 popular Drupal modules along with their URLs where you can find more information and download them:

1. Views - Allows you to create, manage, and display lists of content.

   • URL: Views

2. Pathauto - Automatically generates user-friendly URLs for your content.

   • URL: Pathauto

3. Token - Provides tokens for use in various parts of your site.

   • URL: Token

4. Devel - A suite of developer tools for debugging and performance optimization.

   • URL: Devel

5. Webform - Enables the creation of customizable forms and surveys.

   • URL: Webform

6. CKEditor - Integrates the CKEditor WYSIWYG editor into Drupal.

   • URL: CKEditor

7. Path Redirect - Allows you to create redirects for URLs.

   • URL: Path Redirect

8. Media - Provides a framework for managing and displaying media assets.

   • URL: Media

9. Metatag - Allows you to manage meta tags for better SEO.

   • URL: Metatag

10. Views Slideshow - Enables the creation of image slideshows.

    • URL: Views Slideshow

11. Rules - A powerful module for creating site automation and workflows.

    • URL: Rules

12. Backup and Migrate - Simplifies the process of backing up and restoring your Drupal database.

    • URL: Backup and Migrate

13. Menu Block - Allows you to customize the display of menus.

    • URL: Menu Block

14. Google Analytics - Integrates Google Analytics tracking into your site.

    • URL: Google Analytics

15. Date - Provides date and time fields for content types.

    • URL: Date

16. Admin Toolbar - A modern and feature-rich toolbar for administrators.

    • URL: Admin Toolbar

17. Field Group - Allows you to group fields together in content types.

    • URL: Field Group

18. Views Bulk Operations (VBO) - Enhances Views with batch operations.

    • URL: Views Bulk Operations

19. Entity Reference - Provides a way to create relationships between entities.

    • URL: Entity Reference

20. Geofield - Allows you to store geographic data (latitude, longitude, etc.) in Drupal.

    • URL: Geofield

These modules cover a wide range of functionalities and can significantly enhance your Drupal site's capabilities. Be sure to review each module's documentation and compatibility with your Drupal version before installation.