Use views to list the files in your AWS S3 buckets.
This module lists files from S3 buckets using views. To use S3 as a filesystem for your Drupal installation check the AmazonS3 project.
This module is useful for any kind of integration with the S3 hosting system, and uses the official AWS SDK for PHP library from Amazon through the AWS SDK for PHP module. An example use case would be a private/authenticated video delivery network that stores videos using Amazon's S3 hosting solution.
You can also provide signed URL through CloudFront CDN when available.
This project was created to integrate the Correios Web Service(a brazilian post service) purely into Drupal, so that any modules be able to use it can extend it, without reinventing the integration