A short while ago I ported the contributed module Photoswipe to Backdrop from its Drupal 7 version. This module uses an open source jQuery library by Dmitri Semenov to implement a gallery of images which can be swiped one by one, either to the left or to the right. With a touchscreen device this is a normal swiping action; without a touchscreen small right and left arrows can be used.
It is now the practice in Backdrop to include libraries within the module that uses them, rather than use the separate Libraries module, and I have just completed a new release of Photoswipe (v2.1.0) that does this.
Below is a demonstration - just click on one of the thumbnails to see it in action.
The images show Bluetit parents leaving their nesting box as they fly to and fro feeding their young.