Cover Up is a stack that loads its content before the main page. Dismiss it manually with a link or set the timer.

Cut scene is a video player that automatically navigates to a new page upon completion.

Switcheroo is a dead simple way to swap content. Plays well when nested in other stacks, indluding tabs, lightboxes, etc.

Ken Burns, named after the famous documentarian, applies the "Ken Burns" effect to a background image using basic CSS.