Drupal 8 migrate modules | Drupal 8 guide on Drupal.org

This page contains a list of the Drupal 8 core and most significant contributed modules that are related to upgrading to Drupal 8. Core Migrate modules Please refer to Migrate API overview for technical documentation of core features. Migrate Provides the underlying API for migrating configuration and content to Drupal 8. The migration source may be a different system altogether.

Source: Drupal 8 migrate modules | Drupal 8 guide on Drupal.org

Media entity | Drupal.org

Media Entity is now in core This module has moved to Drupal 8 core! Starting with Drupal 8.4 there is a Media module in Drupal core, which includes the base API from Media Entity, as well as most of the functionality provided by Media Entity Image and Media Entity Document.

Source: Media entity | Drupal.org