Allground is a plugin for WordPress to create fullscreen backgrounds using your images, videos, inserting YouTube videos or maps from Google Maps.
You can set a background to be used throughout the site and you can also create and assign backgrounds for specific posts, pages or custom post types, since Allground will work with your custom post types too.
This demo showcases a background made of images. They can have a caption and a link assigned, you can set the transition and pause length, and define if you want to show arrows to flip through images.
See also the other demos for examples of direct linked videos, YouTube videos and Google Maps.