Project Analysis
Contrib project Drupal 10/11 readiness tester.
#Utility
Modules
Unused modules
View unused modules.
Site Audit
Provides a number of reports.
Entity Relationship Diagram
Render an ERD of your site architecture.
This can be used to create a nicely formatted report, but it takes some effort and doesn't provide one out of the box.
Content Check
Content checking plugins, currently includes link checker.
Layout Builder Settings Report
View overridden layouts.
Layout Builder Usage Reports
View reports on layout builder usage.
Layout Builder Reports
List display modes using layout builder.
Image Styles Mapping
Provides a report on how image styles are used.