Elastic Email offers a full gallery of free templates, but they do show our logo at the bottom. The logo can be removed, but because it is there by default, as soon as Custom Branding becomes enabled the templates are removed from the sub account galleries.
This allows you to customize your customer's free templates by offering as many or as few as you would like. You can edit any existing template, insert your own logo, and save it for use in the sub accounts. Or, you can create your own from scratch.