Number My Post Pages (number-my-post-pages-plugin) free WordPress plugin

Instead of using so many page numbers on your post page or having next and previous links, this plugin handles the pagination with a much more organized way.
In the new version, you get an admin panel with the ability to change the number of pages that shows, whether you want to show the dropdown or not and also you can choose to show the navigation panel if there is only one page or not.
Also works with WP MU.