My eCards plugin has a free, lite version.
Right now, they are a bit disconnected, as in the versions are different, parts of the code are also different and the official documentation only applies to the PRO version.
The plan for the following month is to bring both plugins in line with code updates, version synchronization and better documentation (including videos, which is something I’ve been meaning to do for a while).
Another feature is a visual library update which will include various display options.