Use a third-party CSS or JS Framework, a self-hosted service like a CRM, or a third-party service with the site.
The Entity Synchronization module provides a framework for exchanging data between Drupal and one or more remote systems.
Commerce Exchanger plugin for Croatian National Bank (HNB) The base currency for exchange rates is HRK.
Integration of Jitsi video conferencing.
I will add it later
Cookie SameSite support customises how session cookie is set and read.
This is required only for the sites which require external redirections which redirect the user back to Drupal.
This project integrates Secure Trading online payments into the Drupal Commerce payment and checkout systems.