Recommend It is a content plugin that recommends articles from the same category. It uses jQuery to nicely slide in the recommended articles when the user reaches the bottom of the page. When they scroll back up, it disappears again. You can also close it for good by using the close button and it will not be shown again until the page is reloaded.
Supports Joomla and K2
Customizable color and parameters
Ability to manually insert tag to trigger it any where on page