Library
Things worth keeping on your own device. Free, no account, no form in the way.
Nothing on the shelf yet. Put a PDF in assets/library/ and list it in _data/library.yml.
New notes go out by email first.
Subscribers get each PDF the day it is finished. Free, and your address is never passed on.
Set newsletter_action in _config.yml to switch this form on. Instructions are in README.md.