Script for backing up all (around 26000) search plugins on https://mycroftproject.com/
Just run ./mycroft.sh
Or, rather, download the archive (made on 2020-08-23) from https://archive.org/details/mycroft-project-backup
Mycroft Project copyright statement
Essentially you are not free to copy the website itself but all of the search plugins - the OpenSearch xml description files - are free from restriction.