by John Regan on WordPress.org
Copies/Duplicates Posts, Pages, and Custom Post Types with just one click.
The Simple Copy Post Link
This plugin adds a simple button to the post editor screen which allows editors to duplicate posts quickly and easily. It’s so simple that no configuration is necessary!
Features
Duplicate taxonomy terms and ACF field values, if there are any
Allows users to create a custom header on a per-post basis.
Show the next or previous post in a box that appears when the user scrolls to the bottom of a current post.