Modules

Embed iframes in CKEditor.

Additional attributes get stripped.

Config UI for CKEditor Templates (v4) a

Migrate files into media.

Drupal migrate extensions, extra plugins.

Drupal migrate API.

Migrate into an existing entity's fields.

Create a manifest.yml file to list migrations.

Create multiple files for separate lists.

Not ready for Drupal 10 yet, but can be manually updated.

Configure CKEditor.

Provides CKEditor description elements (dl, dd, dt) plugin.

CKEditor 4.

Use this on Drupal 10 for backwards compatibility.