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Recommendations (for and against) are my personal opinion only and may be out of date.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? As of December 2021 I've updated most of the sites I look after to Drupal 9 (experience: mixed). I haven't decided how to label future version compatibility as D10 will be coming soon as well. The upgrade_status module is superb. You're bound to have issues with composer. Also watch out for a nasty session headers bug with redirect_after_login.

(1 modules in list)
Module name or machine name
Any text in the notes
Name D8 Personally Tested Last Updated
Computed Field (computed_field) 2018-11-25

d.o. page

Add a field whose value is calculated using raw PHP; specifically $value = 'foo';

(The recommendation is you write your PHP in a module of your own, and then call that method from the UI - for security and version control reasons).

Note: value is only calculated when nodes are saved (i.e. will initially be empty for existing content).

D8 status; alpha but working.