I just released a minor update of my plugin Where did they go from here. This version fixes an issue for users who are deleting the plugin from within the WordPress admin interface.
I’ve also cleaned up a bit of code for updates, which is no longer required within the current version of WordPress.
For those who haven’t used this plugin before, it allows you to show “Readers who viewed this page, also viewed” links on your page. Much like Amazon.com’s product pages. The plugin helps you improve reader retention.