Aleksandr Zelenin

By pressing this button the content of the page will be displayed in a print-friendly mode and allows the user to print it.
Shortcode: [printme] 
php function: printme_link();

Print me!

This plugin adds a "Print" button on every post and page (supports custom post types too).

Erick Hitter

Oomph, Inc.

Steven Word

Extends WordPress’ template system to support printer-friendly templates for posts, pages, and custom post types. Uses WP standard template naming to support templates on a post-type basis. Supports printing paged posts on single page. Adds nice URLs for printer-friendly pages.
IMPORTANT: There are certain plugins that may interfere with this plugin’s functionality. See the FAQ for more information.

WP Print Friendly

Extends WordPress' template system to support printer-friendly templates. Works with permalink structures to support nice URLs.

Print me! vs WP Print Friendly