CS-Cart Addon "Additional services" can offer to customer store's additional services (gift packaging, shipment insurance, etc.) on the checkout page on shipping method step.
Used does not need to search for store's additional services, he will see them in any case when choosing shipping method. Even if user is initially not planned to pack his order in a nice wrapper, he might now ;)
Administrator need to create a list of provided services, individually define price, usergroup ids, shipping ids and status of service. He also can choose on addon settings how to display services list: as radio or checkbox group
No need for administrator to create individual products or options for his store services
Ability to set service for the particular shipping method, product, category.
Ability to add service at order edit page in admin