Useful Drupal modules

Click on the module name for notes, comments, patches.
Recommendations (for and against) are my personal opinion only and may be out of date. Feel free to email with corrections/suggestions.

Why haven't you mentioned Drupal 9? I will be adding this, but as of August 2021, this site you are reading is the only Drupal site of mine I've been able to upgrade to D9, so although you can check D9 compatibility status of all modules (use upgrade_status, it's superb) I can't speak from personal experience about any of them.

(1 modules in list)
Module name or machine name
Any text in the notes
Name D8 Personally Tested Last Updated
Spambot (spambot) 2019-04-05

d.o. page

"Essential"

Scans email addresses/usernames/IP addresses against the stopforumspam.com database and then blocks or deletes the accounts.
You can set the threshold - i.e. how many times an email address needs to be listed in the spam database before action is taken.
You can also have it scan your entire existing database, not just new users. (It does this via a configurable cron run.)

Tested with D7.