Let’s Encrypt is a free, automated, and open Certificate Authority.
It is a great solution for adding certificates to your system without the costs or the hassle.
There is wide support for it, see https://letsencrypt.org/ and https://letsencrypt.org/getting-started/

It would be great to have support for Let's Encrypt in ZENworks!!!

This essentially comes down to adding support for the ACME protocol
and including an ACME client (see https://letsencrypt.org/docs/client-options/)

With a how to document and experimental support in the first release
Later on, GUI configuration wizard and inclusion of Let's Encrypt configuration in the Installation and Upgrade, can be added.

Hopefully this is possible...