Field Collection provides a field for entities (nodes, users, taxonomies, comments, etc.) to which a collection or group of any number of fields can be included and treated as a whole or single unit.

Provides seamless Single Sign-On (SSO) functionality between two Backdrop CMS sites.

Universally Unique IDentifier

Simplenews publishes and sends newsletters to lists of subscribers. Both anonymous and authenticated users can opt-in to different mailing lists. HTML email can be sent by adding Mime mail module.

Maillog provides logging of all email for debugging.

The Simplenews Roles module for Backdrop CMS synchronizes user subscriptions to newsletters based on their role membership.

A port of the Drupal 7 Aggregator module to Backdrop.

This module provides an additional formatter to render values in all core fields as HTML or comma-separated lists.