Flysystem

The Flysystem module is the first remote storage solution to be available for Drupal 8 (and it's also recently available in D7). It uses the Flysystem PHP library, a modern filesystem abstraction designed to allow for the easy swapping of one filesystem with another. The Flysystem library is gaining widespread adoption in the PHP world, and is the default filesystem layer in the Laravel framework. Incorporating it in a Drupal project is an example of the "getting off the island" or "proudly invented elsewhere" philosophies often discussed for Drupal 8 - making use of the work done in the wider PHP community rather than struggling to reinvent everything from scratch.