jQuery scrollbar plugins makes it possible to add cool scrollbars to content areas within your pages. This can be really useful in some cases but should also be used with great care. jQuery scrollbar plugins can be awesome for e.g .adding a scrollbar below a carousel slider or allowing visitors to scroll images that are too large to fit the page.
Another popular and related feature you can consider for your website is infinite scroll. With jQuery infinite scrolling plugins it is possible to add this to your website without too much coding effort. Hope you find this collection useful and that you will take time to share your thoughts in a comment.