Modules

Image cropping library.

Crop images around a set point.

Drupal media module.

More issues

Drupal core taxonomy module.

Adds a time only field.

Stores time as integers, some issues, including how to migrate date values into it.

See Field Time instead.

Stores time as hh:mm:ss.

Import/export content in yaml files.

Use responsive image styles for inline images.

Create groups with private content.

There are lots of additional modules with extra features.

The UI can be hard to work with. Modules or custom code are needed to streamline it.

Add a field to content entities to select the group to add them to.