The configuration and custom modules for the Drupal CMS.
The hellox_feed_pager and hellox_podcast_feed modules are entirely custom and are not derived from any other Drupal modules.
On the other hand, backup_migrate and backup_migrate_s3 are Drupal community modules, but both have been combined with dependencies and hand-patched to get around several deficiencies (lack of Postgres support, new AWS S3 authentication protocols, etc.) whose remedies still have not been brought into the mainline branches of these modules. The aws-sdk-php library, necessary for usage of backup_migrate_s3, has been provided in the most recent 2.x version.