Use a third-party CSS or JS Framework, a self-hosted service like a CRM, or a third-party service with the site.
Jira API Connector looks to connect Drupal with Jira, by pushing and pulling data back and forth.
Adds the Drupal Commerce 1.x integration with Retail Rocket service.
Drupal 8 port of Commerce SecurePay.
Vitals is a module that provides a secure endpoint which can be consumed by clients to monitor site health.
This module provides bare-bones functionality for integrating with the Telegram bot API, for use by other modules. It also provides the following, built-in triggers:
This module allows you to send HTML emails that are properly styled through the email template.
The Simple HTML mail module requires: