DHL Versenden for Magento 1
The module for Magento 1 can be found on the Magento Marketplace.
DHL Shipping for Magento 2
The module for Magento 2 can be found on Github.
For more details about its progress, please see this FAQ article.
DHL Intraship (deprecated)
The Intraship module has reached its End of Life. Users of the Intraship module need to migrate to DHL Versenden / Shipping.
The last version is attached to this article for reference purposes. Do NOT use Intraship for new installations. It is no longer maintained or supported.
Here is a list of all documentations.