A WordPress plugin that allows pages to have a slug (URL) that is only a number.
Normally is not possible for a page to have a URL like yoursite.com/about/2/ (a page called "2" that's a child of "About"). That URL conflicts with paged content feature where you can posts and pages with multiple pages of content by adding <!--nextpage--> within your content.
This plugin allows you to have pages with numbers as slugs by giving up the ability to have paged content pages which isn't a big deal as most people don't use paged content pages anyway.