Jack

On All The Tropes, Jack could refer to:


 * Jack (Homes novel), a book by A.M. Homes that is frequently the target of Moral Guardians
 * Jack (webcomic), a Furry Comic about heaven/hell, their inhabitants, and various places in between.
 * And Jack (film), a live action Film about a boy who ages rather swiftly.

The Other Wiki has a much longer list of works and characters named Jack, including four more movies, two books, two bands, an animated television show, a network, the eponymous characters from Jack and the Beanstalk and Jack the Giant Killer, and the playing card. With that many missing pages, we don't know Jack.